diff --git a/.gitignore b/.gitignore
index cd8f466..797a63e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,4 @@ Cargo.lock
 /.idea
 /parsable_macro_derive/target
 /tests/test-*.obj
-/tests/GameSave2.Techblox
+/tests/*.out.Techblox
diff --git a/src/techblox/blocks/engine.rs b/src/techblox/blocks/engine.rs
new file mode 100644
index 0000000..176750f
--- /dev/null
+++ b/src/techblox/blocks/engine.rs
@@ -0,0 +1,39 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity}};
+use libfj_parsable_macro_derive::*;
+
+/// Engine entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct EngineBlockEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Engine tweakables component
+    pub tweak_component: EngineBlockTweakableComponent,
+}
+
+impl SerializedEntityDescriptor for EngineBlockEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 1
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.tweak_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("EngineBlockEntityDescriptor") // 1757314505
+    }
+}
+
+/// Engine settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct EngineBlockTweakableComponent  {
+    /// Engine power (percent?)
+    pub power: f32,
+    /// Is the engine's transmission automatic? (bool)
+    pub automatic_gears: u32, // why is this not stored as u8 like the other bools?
+}
+
+impl SerializedEntityComponent for EngineBlockTweakableComponent  {}
diff --git a/src/techblox/blocks/joint.rs b/src/techblox/blocks/joint.rs
new file mode 100644
index 0000000..eb14a01
--- /dev/null
+++ b/src/techblox/blocks/joint.rs
@@ -0,0 +1,24 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity}};
+use libfj_parsable_macro_derive::*;
+
+/// Joint block entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct JointBlockEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+}
+
+impl SerializedEntityDescriptor for JointBlockEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components()
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        self.block.components()
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("JointBlockEntityDescriptorV3") // 3586818581
+    }
+}
diff --git a/src/techblox/blocks/lookup_tables.rs b/src/techblox/blocks/lookup_tables.rs
index 79ba0dc..bcb695d 100644
--- a/src/techblox/blocks/lookup_tables.rs
+++ b/src/techblox/blocks/lookup_tables.rs
@@ -1,16 +1,100 @@
 use std::io::Read;
 
 use crate::techblox::{Parsable, SerializedEntityDescriptor};
-#[cfg(debug_assertions)]
 use crate::techblox::blocks::*;
 
+const HASHNAMES: &[&str] = &[
+    // Block group info entities
+    "BlockGroupEntityDescriptorV0",
+    // Block entities
+    "StandardBlockEntityDescriptorV4",
+    "BatteryEntityDescriptorV4",
+    "MotorEntityDescriptorV7",
+    "LeverEntityDescriptorV7",
+    "ButtonEntityDescriptorV6",
+    "JointBlockEntityDescriptorV3",
+    "ServoEntityDescriptorV7",
+    "PistonEntityDescriptorV6",
+    "DampedSpringEntityDescriptorV5",
+    "DampedAngularSpringEntityDescriptorV4",
+    "SpawnPointEntityDescriptorV6",
+    "BuildingSpawnPointEntityDescriptorV4",
+    "TriggerEntityDescriptorV6",
+    "PilotSeatEntityDescriptorV4",
+    "PilotSeatEntityDescriptorV3",
+    "TextBlockEntityDescriptorV4",
+    "PassengerSeatEntityDescriptorV4",
+    "PassengerSeatEntityDescriptorV3",
+    "LogicBlockEntityDescriptorV1",
+    "TyreEntityDescriptorV1",
+    "ObjectIDEntityDescriptorV1",
+    "MoverEntityDescriptorV1",
+    "RotatorEntityDescriptorV1",
+    "DamperEntityDescriptorV1",
+    "AdvancedDamperEntityDescriptorV1",
+    "CoMEntityDescriptor",
+    "FilterBlockEntityDescriptorV1",
+    "ConstrainerEntityDescriptorV1",
+    "NumberToTextBlockEntityDescriptorV1",
+    "CentreHudBlockEntityDescriptorV1",
+    "ObjectiveHudBlockEntityDescriptorV1",
+    "GameStatsHudBlockEntityDescriptorV1",
+    "GameOverHudBlockEntityDescriptorV1",
+    "TimerBlockEntityDescriptorV1",
+    "BitBlockEntityDescriptorV2",
+    "ConstantBlockEntityDescriptor",
+    "CounterBlockEntityDescriptorV1",
+    "SimpleSfxEntityDescriptorV1",
+    "LoopedSfxEntityDescriptorV1",
+    "MusicBlockEntityDescriptorV1",
+    "ProjectileBlockEntityDescriptorV1",
+    "DamagingSurfaceEntityDescriptorV1",
+    "DestructionManagerEntityDescriptorV1",
+    "ChunkDestructionBlockEntityDescriptorV1",
+    "ClusterDestructionBlockEntityDescriptorV1",
+    "PickupBlockEntityDescriptorV1",
+    "PointLightEntityDescriptorV1",
+    "SpotLightEntityDescriptorV1",
+    "SunLightEntityDescriptorV1",
+    "AmbientLightEntityDescriptorV1",
+    "FogEntityDescriptorV1",
+    "SkyEntityDescriptorV1",
+    "SynchronizedWireBlockEntityDescriptor",
+    "WheelRigEntityDescriptor",
+    "WheelRigSteerableEntityDescriptor",
+    "EngineBlockEntityDescriptor",
+    // Other Non-block entities (stored after blocks in game saves)
+    "WireEntityDescriptorMock",
+    "GlobalWireSettingsEntityDescriptor",
+    "FlyCamEntityDescriptorV0",
+    "CharacterCameraEntityDescriptorV1",
+];
+
 pub fn lookup_hashname(hash: u32, data: &mut dyn Read) -> std::io::Result<Box<dyn SerializedEntityDescriptor>> {
     Ok(match hash {
         1357220432 /*StandardBlockEntityDescriptorV4*/ => Box::new(BlockEntity::parse(data)?),
+        2281299333 /*PilotSeatEntityDescriptorV4*/ => Box::new(PilotSeatEntity::parse(data)?),
+        1360086092 /*PassengerSeatEntityDescriptorV4*/ => Box::new(PassengerSeatEntity::parse(data)?),
+        1757314505 /*EngineBlockEntityDescriptor*/ => Box::new(EngineBlockEntity::parse(data)?),
+        3586818581 /*JointBlockEntityDescriptorV3*/ => Box::new(JointBlockEntity::parse(data)?),
+        3789998433 /*DampedAngularSpringEntityDescriptorV4*/ => Box::new(DampedAngularSpringEntity::parse(data)?),
+        2892049599 /*DampedSpringEntityDescriptorV5*/ => Box::new(DampedSpringEntity::parse(data)?),
+        1156723746 /*WheelRigEntityDescriptor*/ => Box::new(WheelRigEntity::parse(data)?),
+        1864425618 /*WheelRigSteerableEntityDescriptor*/ => Box::new(WheelRigSteerableEntity::parse(data)?),
+        1517625162 /*TyreEntityDescriptorV1*/ => Box::new(TyreEntity::parse(data)?),
         _ => {
             #[cfg(debug_assertions)]
-            println!("Unknown hash ID {}", hash);
+            println!("Unknown hash ID {} (missing entry for {})", hash, lookup_name_by_hash(hash).unwrap_or("<Unknown>"));
             return Err(std::io::Error::new(std::io::ErrorKind::Other, format!("Unrecognised hash {}", hash)))
         }
     })
 }
+
+pub fn lookup_name_by_hash(hash: u32) -> Option<&'static str> {
+    for name in HASHNAMES {
+        if crate::techblox::hashname(name) == hash {
+            return Some(name);
+        }
+    }
+    None
+}
diff --git a/src/techblox/blocks/mod.rs b/src/techblox/blocks/mod.rs
index b0ff2a3..e1f926c 100644
--- a/src/techblox/blocks/mod.rs
+++ b/src/techblox/blocks/mod.rs
@@ -2,7 +2,14 @@
 
 mod block_entity;
 mod common_components;
+mod engine;
+mod joint;
 mod lookup_tables;
+mod pilot_seat;
+mod passenger_seat;
+mod spring;
+mod tyre;
+mod wheel_rig;
 mod wire_entity;
 
 pub use block_entity::{BlockEntity};
@@ -10,5 +17,13 @@ pub use common_components::{DBEntityStruct, PositionEntityStruct, ScalingEntityS
 SkewComponent, GridRotationStruct, SerializedGridConnectionsEntityStruct, SerializedBlockPlacementInfoStruct,
 SerializedCubeMaterialStruct, SerializedUniformBlockScaleEntityStruct, SerializedColourParameterEntityStruct,
 BlockGroupEntityComponent};
+pub use engine::{EngineBlockEntity, EngineBlockTweakableComponent};
+pub use joint::{JointBlockEntity};
+pub use pilot_seat::{PilotSeatEntity, SeatFollowCamComponent};
+pub use passenger_seat::PassengerSeatEntity;
 pub(crate) use lookup_tables::*;
+pub use spring::{DampedAngularSpringEntity, TweakableJointDampingComponent, DampedAngularSpringROStruct,
+DampedSpringEntity, DampedSpringROStruct};
+pub use tyre::{TyreEntity};
+pub use wheel_rig::{WheelRigEntity, WheelRigTweakableStruct, WheelRigSteerableEntity, WheelRigSteerableTweakableStruct};
 pub use wire_entity::{SerializedWireEntity, WireSaveDataStruct, SerializedGlobalWireSettingsEntity, GlobalWireSettingsEntityStruct};
diff --git a/src/techblox/blocks/passenger_seat.rs b/src/techblox/blocks/passenger_seat.rs
new file mode 100644
index 0000000..00269de
--- /dev/null
+++ b/src/techblox/blocks/passenger_seat.rs
@@ -0,0 +1,28 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity, SeatFollowCamComponent}};
+use libfj_parsable_macro_derive::*;
+
+/// Passenger seat entity descriptor (V4)
+#[derive(Copy, Clone, Parsable)]
+pub struct PassengerSeatEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Seat following camera component
+    pub cam_component: SeatFollowCamComponent,
+}
+
+impl SerializedEntityDescriptor for PassengerSeatEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 1
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.cam_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("PassengerSeatEntityDescriptorV4") // 1360086092
+    }
+}
diff --git a/src/techblox/blocks/pilot_seat.rs b/src/techblox/blocks/pilot_seat.rs
new file mode 100644
index 0000000..cdff457
--- /dev/null
+++ b/src/techblox/blocks/pilot_seat.rs
@@ -0,0 +1,36 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent, blocks::BlockEntity};
+use libfj_parsable_macro_derive::*;
+
+/// Pilot seat entity descriptor (V4)
+#[derive(Copy, Clone, Parsable)]
+pub struct PilotSeatEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Seat following camera component
+    pub cam_component: SeatFollowCamComponent,
+}
+
+impl SerializedEntityDescriptor for PilotSeatEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 1
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.cam_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("PilotSeatEntityDescriptorV4") // 2281299333
+    }
+}
+
+/// Seat settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct SeatFollowCamComponent {
+    /// Should the camera follow the seat? (bool)
+    pub follow: u8,
+}
+
+impl SerializedEntityComponent for SeatFollowCamComponent {}
diff --git a/src/techblox/blocks/spring.rs b/src/techblox/blocks/spring.rs
new file mode 100644
index 0000000..e6a153f
--- /dev/null
+++ b/src/techblox/blocks/spring.rs
@@ -0,0 +1,90 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity}};
+use libfj_parsable_macro_derive::*;
+
+/// Damped angular spring entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct DampedAngularSpringEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Joint tweakables component
+    pub tweak_component: TweakableJointDampingComponent,
+    /// Spring tweakables component
+    pub spring_component: DampedAngularSpringROStruct,
+}
+
+impl SerializedEntityDescriptor for DampedAngularSpringEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 2
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.tweak_component);
+        c.push(&self.spring_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("DampedAngularSpringEntityDescriptorV4") // 3789998433
+    }
+}
+
+/// Damped spring entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct DampedSpringEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Joint tweakables component
+    pub tweak_component: TweakableJointDampingComponent,
+    /// Spring tweakables component
+    pub spring_component: DampedSpringROStruct,
+}
+
+impl SerializedEntityDescriptor for DampedSpringEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 2
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.tweak_component);
+        c.push(&self.spring_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("DampedSpringEntityDescriptorV5") // 2892049599
+    }
+}
+
+/// Joint settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct TweakableJointDampingComponent  {
+    /// Joint stiffness (percent?)
+    pub stiffness: f32,
+    /// Force damping (percent?)
+    pub damping: f32,
+}
+
+impl SerializedEntityComponent for TweakableJointDampingComponent {}
+
+/// Damped angular spring settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct DampedSpringROStruct  {
+    /// Maximum spring extension
+    pub max_extension: f32,
+}
+
+impl SerializedEntityComponent for DampedSpringROStruct {}
+
+/// Damped angular spring settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct DampedAngularSpringROStruct  {
+    /// Minimum sprint extension
+    pub joint_min: f32,
+    /// Maximum sprint extension
+    pub joint_max: f32,
+}
+
+impl SerializedEntityComponent for DampedAngularSpringROStruct {}
diff --git a/src/techblox/blocks/tyre.rs b/src/techblox/blocks/tyre.rs
new file mode 100644
index 0000000..e7a179c
--- /dev/null
+++ b/src/techblox/blocks/tyre.rs
@@ -0,0 +1,24 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity}};
+use libfj_parsable_macro_derive::*;
+
+/// Tire entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct TyreEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+}
+
+impl SerializedEntityDescriptor for TyreEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components()
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        self.block.components()
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("TyreEntityDescriptorV1") // 1517625162
+    }
+}
diff --git a/src/techblox/blocks/wheel_rig.rs b/src/techblox/blocks/wheel_rig.rs
new file mode 100644
index 0000000..e3f3888
--- /dev/null
+++ b/src/techblox/blocks/wheel_rig.rs
@@ -0,0 +1,74 @@
+use crate::techblox::{SerializedEntityDescriptor, Parsable, SerializedEntityComponent,
+blocks::{BlockEntity, TweakableJointDampingComponent}};
+use libfj_parsable_macro_derive::*;
+
+/// Wheel rig entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct WheelRigEntity {
+    /// parent block entity
+    pub block: BlockEntity,
+    /// Wheel tweakables component
+    pub tweak_component: WheelRigTweakableStruct,
+    /// Joint tweakables component
+    pub joint_component: TweakableJointDampingComponent,
+}
+
+impl SerializedEntityDescriptor for WheelRigEntity {
+    fn serialized_components() -> u8 {
+        BlockEntity::serialized_components() + 2
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.tweak_component);
+        c.push(&self.joint_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("WheelRigEntityDescriptor") // 1156723746
+    }
+}
+
+/// Wheel rig entity descriptor
+#[derive(Copy, Clone, Parsable)]
+pub struct WheelRigSteerableEntity {
+    /// parent wheel rig entity
+    pub block: WheelRigEntity,
+    /// Steering tweakables component
+    pub tweak_component: WheelRigSteerableTweakableStruct,
+}
+
+impl SerializedEntityDescriptor for WheelRigSteerableEntity {
+    fn serialized_components() -> u8 {
+        WheelRigEntity::serialized_components() + 1
+    }
+
+    fn components<'a>(&'a self) -> Vec<&'a dyn SerializedEntityComponent> {
+        let mut c = self.block.components();
+        c.push(&self.tweak_component);
+        return c;
+    }
+
+    fn hash_name(&self) -> u32 {
+        Self::hash("WheelRigSteerableEntityDescriptor") // 1864425618
+    }
+}
+
+/// Wheel rig settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct WheelRigTweakableStruct  {
+    /// Brake force (percent?)
+    pub braking_strength: f32,
+}
+
+impl SerializedEntityComponent for WheelRigTweakableStruct {}
+
+/// Steering wheel rig settings entity component.
+#[derive(Copy, Clone, Parsable)]
+pub struct WheelRigSteerableTweakableStruct  {
+    /// Wheel steering angle (max?)
+    pub steer_angle: f32,
+}
+
+impl SerializedEntityComponent for WheelRigSteerableTweakableStruct {}
diff --git a/src/techblox/entity_header.rs b/src/techblox/entity_header.rs
index 229f193..7513d77 100644
--- a/src/techblox/entity_header.rs
+++ b/src/techblox/entity_header.rs
@@ -1,4 +1,4 @@
-use crate::techblox::{hashname, brute_force, Parsable};
+use crate::techblox::{hashname, brute_force, Parsable, blocks::lookup_name_by_hash};
 use libfj_parsable_macro_derive::*;
 
 /// An entity's header information.
@@ -24,6 +24,17 @@ impl EntityHeader {
         brute_force(self.hash)
     }
 
+    /// Lookup the name from the header's hash from a list of known entity names.
+    ///
+    /// This is much faster than guess_name() and is guaranteed to return a correct result if one exists.
+    /// If the hash has no known correct name, None is returned instead.
+    pub fn lookup_name(&self) -> Option<String> {
+        if let Some(name) = lookup_name_by_hash(self.hash) {
+            return Some(name.to_string());
+        }
+        None
+    }
+
     /// Create an entity header using the hash of `name`.
     pub fn from_name(name: &str, entity_id: u32, group_id: u32, component_count: u8) -> Self {
         Self {
diff --git a/src/techblox/gamesave.rs b/src/techblox/gamesave.rs
index e2458ca..d458387 100644
--- a/src/techblox/gamesave.rs
+++ b/src/techblox/gamesave.rs
@@ -93,6 +93,8 @@ impl Parsable for GameSave {
         for _i in 0..cube_count {
             let header = EntityHeader::parse(data)?;
             let hash = header.hash;
+            #[cfg(debug_assertions)]
+            println!("Handling block {} (hash: {} id:{}/{} components: {})", cubes_h.len(), hash, header.entity_id, header.group_id, header.component_count);
             cubes_h.push(header);
             cubes_e.push(lookup_hashname(hash, data)?);
         }
diff --git a/test.sh b/test.sh
index 5f9f80e..157f5fa 100755
--- a/test.sh
+++ b/test.sh
@@ -1,4 +1,5 @@
 #!/bin/bash
 RUST_BACKTRACE=1 cargo test --all-features -- --nocapture
+# RUST_BACKTRACE=1 cargo test --release --all-features -- --nocapture
 # RUST_BACKTRACE=1 cargo test --features techblox -- --nocapture
 exit $?
diff --git a/tests/All.Techblox b/tests/All.Techblox
new file mode 100644
index 0000000..f200d1c
Binary files /dev/null and b/tests/All.Techblox differ
diff --git a/tests/techblox_parsing.rs b/tests/techblox_parsing.rs
index 7546e34..09de5ad 100644
--- a/tests/techblox_parsing.rs
+++ b/tests/techblox_parsing.rs
@@ -10,7 +10,11 @@ use std::fs::{File, OpenOptions};
 #[cfg(feature = "techblox")]
 const GAMESAVE_PATH: &str = "tests/GameSave.Techblox";
 #[cfg(feature = "techblox")]
-const GAMESAVE_PATH2: &str = "tests/GameSave2.Techblox";
+const GAMESAVE_PATH_OUT: &str = "tests/GameSave.out.Techblox";
+#[cfg(feature = "techblox")]
+const GAMESAVE_PATH_ALL: &str = "tests/All.Techblox";
+#[cfg(feature = "techblox")]
+const GAMESAVE_PATH_ALL_OUT: &str = "tests/All.out.Techblox";
 
 #[cfg(feature = "techblox")]
 const HASHNAMES: &[&str] = &[
@@ -148,15 +152,70 @@ fn hash_tb_name() {
 #[cfg(feature = "techblox")]
 #[test]
 fn techblox_gamesave_perfect_parse() -> Result<(), ()> {
-    let mut in_file = File::open(GAMESAVE_PATH).map_err(|_| ())?;
+    let mut in_file = File::open(GAMESAVE_PATH_ALL).map_err(|_| ())?;
+    let mut buf = Vec::new();
+    in_file.read_to_end(&mut buf).map_err(|_| ())?;
+    let gs = techblox::GameSave::parse(&mut buf.as_slice()).map_err(|_| ())?;
+    let mut out_file = OpenOptions::new()
+                    .write(true)
+                    .truncate(true)
+                    .create(true)
+                    .open(GAMESAVE_PATH_OUT)
+                    .map_err(|_| ())?;
+    gs.dump(&mut out_file).map_err(|_| ())?;
+    assert_eq!(in_file.stream_position().unwrap(), out_file.stream_position().unwrap());
+    Ok(())
+}
+
+#[cfg(feature = "techblox")]
+#[test]
+fn techblox_gamesave_parse_all() -> Result<(), ()> {
+    let mut in_file = File::open(GAMESAVE_PATH_ALL).map_err(|_| ())?;
     let mut buf = Vec::new();
     in_file.read_to_end(&mut buf).map_err(|_| ())?;
     let gs = techblox::GameSave::parse(&mut buf.as_slice()).map_err(|_| ())?;
+
+    // verify
+    for i in 1..(gs.group_len as usize) {
+        assert_eq!(gs.group_headers[i-1].hash, gs.group_headers[i].hash);
+        //println!("#{} count {} vs {}", i, gs.group_headers[i-1].component_count, gs.group_headers[i].component_count);
+        assert_eq!(gs.group_headers[i-1].component_count, gs.group_headers[i].component_count);
+    }
+    for i in 0..(gs.group_len as usize) {
+        assert_eq!(gs.group_headers[i].component_count, techblox::BlockGroupEntity::serialized_components());
+        assert_eq!(gs.group_headers[i].hash, gs.cube_groups[i].hash_name());
+    }
+    for i in 1..(gs.cube_len as usize) {
+        //assert_eq!(gs.cube_headers[i-1].hash, gs.cube_headers[i].hash);
+        //println!("#{} count {} vs {}", i, gs.cube_headers[i-1].component_count, gs.cube_headers[i].component_count);
+        if gs.cube_headers[i-1].hash == gs.cube_headers[i].hash {
+            assert_eq!(gs.group_headers[i-1].component_count, gs.group_headers[i].component_count);
+        }
+    }
+    for i in 0..(gs.cube_len as usize) {
+        assert!(gs.cube_headers[i].component_count >= blocks::BlockEntity::serialized_components());
+        //println!("#{} components: {}", i, gs.cube_headers[i].component_count);
+        assert_eq!(gs.cube_headers[i].hash, gs.cube_entities[i].hash_name());
+    }
+
+    //println!("Parsed wire settings hash: {} obsolete? {}", gs.wire_settings_header.hash, gs.wire_settings_entity.settings_component.obsolete != 0);
+    assert_eq!(gs.wire_settings_header.hash, EntityHeader::from_name("GlobalWireSettingsEntityDescriptor", 0, 0, 0).hash);
+    assert_eq!(gs.wire_settings_header.hash, gs.wire_settings_entity.hash_name());
+
+    //println!("Parsed Flycam hash: {}", gs.flycam_header.hash);
+    assert_eq!(gs.flycam_header.hash, EntityHeader::from_name("FlyCamEntityDescriptorV0", 0, 0, 0).hash);
+    assert_eq!(gs.flycam_header.hash, gs.flycam_entity.hash_name());
+
+    //println!("Parsed Phycam hash: {}", gs.phycam_header.hash);
+    assert_eq!(gs.phycam_header.hash, EntityHeader::from_name("CharacterCameraEntityDescriptorV1", 0, 0, 0).hash);
+    assert_eq!(gs.phycam_header.hash, gs.phycam_entity.hash_name());
+
+    // write out
     let mut out_file = OpenOptions::new()
                     .write(true)
                     .truncate(true)
                     .create(true)
-                    .open(GAMESAVE_PATH2)
+                    .open(GAMESAVE_PATH_ALL_OUT)
                     .map_err(|_| ())?;
     gs.dump(&mut out_file).map_err(|_| ())?;
     assert_eq!(in_file.stream_position().unwrap(), out_file.stream_position().unwrap());