diff --git a/LEGO1/mxatomid.h b/LEGO1/mxatomid.h
index 6b7dddbb..4a2082cf 100644
--- a/LEGO1/mxatomid.h
+++ b/LEGO1/mxatomid.h
@@ -5,10 +5,10 @@
 
 enum LookupMode
 {
-    LookupMode_Exact = 0,
-    LookupMode_LowerCase = 1,
-    LookupMode_UpperCase = 2,
-    LookupMode_LowerCase2 = 3
+  LookupMode_Exact = 0,
+  LookupMode_LowerCase = 1,
+  LookupMode_UpperCase = 2,
+  LookupMode_LowerCase2 = 3
 };
 
 class MxAtomId
diff --git a/LEGO1/mxdsaction.cpp b/LEGO1/mxdsaction.cpp
index a193ab21..e5162f89 100644
--- a/LEGO1/mxdsaction.cpp
+++ b/LEGO1/mxdsaction.cpp
@@ -4,9 +4,10 @@
 MxDSAction::MxDSAction()
 {
   // TODO
+  this->SetType(MxDSType_Action);
 }
 
-// OFFSET: LEGO1 0x100ada80
+// OFFSET: LEGO1 0x100ada80 STUB
 MxDSAction::~MxDSAction()
 {
   // TODO
diff --git a/LEGO1/mxdsanim.cpp b/LEGO1/mxdsanim.cpp
index 9a56d359..b9b887cd 100644
--- a/LEGO1/mxdsanim.cpp
+++ b/LEGO1/mxdsanim.cpp
@@ -3,11 +3,10 @@
 // OFFSET: LEGO1 0x100c8ff0
 MxDSAnim::MxDSAnim()
 {
-  // TODO
+  this->SetType(MxDSType_Anim);
 }
 
 // OFFSET: LEGO1 0x100c91a0
 MxDSAnim::~MxDSAnim()
 {
-  // TODO
 }
diff --git a/LEGO1/mxdsevent.cpp b/LEGO1/mxdsevent.cpp
index a45ec93a..b6571075 100644
--- a/LEGO1/mxdsevent.cpp
+++ b/LEGO1/mxdsevent.cpp
@@ -1,13 +1,12 @@
 #include "mxdsevent.h"
 
-// OFFSET: LEGO1 0x100c95f0 STUB
+// OFFSET: LEGO1 0x100c95f0
 MxDSEvent::MxDSEvent()
 {
-  // TODO
+  this->SetType(MxDSType_Event);
 }
 
-// OFFSET: LEGO1 0x100c97a0 STUB
+// OFFSET: LEGO1 0x100c97a0
 MxDSEvent::~MxDSEvent()
 {
-  // TODO
 }
diff --git a/LEGO1/mxdsmediaaction.cpp b/LEGO1/mxdsmediaaction.cpp
index 9587b152..5f9c1132 100644
--- a/LEGO1/mxdsmediaaction.cpp
+++ b/LEGO1/mxdsmediaaction.cpp
@@ -4,9 +4,10 @@
 MxDSMediaAction::MxDSMediaAction()
 {
   // TODO
+  this->SetType(MxDSType_MediaAction);
 }
 
-// OFFSET: LEGO1 0x100c8cf0
+// OFFSET: LEGO1 0x100c8cf0 STUB
 MxDSMediaAction::~MxDSMediaAction()
 {
   // TODO
diff --git a/LEGO1/mxdsmultiaction.cpp b/LEGO1/mxdsmultiaction.cpp
index 4b36f2ec..4188fb66 100644
--- a/LEGO1/mxdsmultiaction.cpp
+++ b/LEGO1/mxdsmultiaction.cpp
@@ -3,11 +3,12 @@
 // OFFSET: LEGO1 0x100c9b90
 MxDSMultiAction::MxDSMultiAction()
 {
-
+  // TODO
+  this->SetType(MxDSType_MultiAction);
 }
 
-// OFFSET: LEGO1 0x100ca060
+// OFFSET: LEGO1 0x100ca060 STUB
 MxDSMultiAction::~MxDSMultiAction()
 {
-
+  // TODO
 }
diff --git a/LEGO1/mxdsobject.cpp b/LEGO1/mxdsobject.cpp
index abe8902f..2b478b88 100644
--- a/LEGO1/mxdsobject.cpp
+++ b/LEGO1/mxdsobject.cpp
@@ -3,10 +3,12 @@
 #include <string.h>
 #include <stdlib.h>
 
+DECOMP_SIZE_ASSERT(MxDSObject, 0x2c);
+
 // OFFSET: LEGO1 0x100bf6a0
 MxDSObject::MxDSObject()
 {
-  this->m_unk0c = 0;
+  this->SetType(MxDSType_Object);
   this->m_sourceName = NULL;
   this->m_unk14 = 0;
   this->m_objectName = NULL;
@@ -83,15 +85,15 @@ void MxDSObject::SetSourceName(const char *p_sourceName)
 }
 
 // OFFSET: LEGO1 0x100bf9c0
-int MxDSObject::unk14()
+undefined4 MxDSObject::unk14()
 {
   return 10;
 }
 
 // OFFSET: LEGO1 0x100bf9d0
-unsigned int MxDSObject::CalculateUnk08()
+MxU32 MxDSObject::CalculateUnk08()
 {
-  unsigned int unk08;
+  MxU32 unk08;
 
   if (this->m_sourceName)
     unk08 = strlen(this->m_sourceName) + 3;
@@ -111,16 +113,16 @@ unsigned int MxDSObject::CalculateUnk08()
 }
 
 // OFFSET: LEGO1 0x100bfa20
-void MxDSObject::Parse(char **p_source, MxU16 p_unk24)
+void MxDSObject::Parse(char **p_source, MxS16 p_unk24)
 {
   this->SetSourceName(*p_source);
   *p_source += strlen(this->m_sourceName) + 1;
-  this->m_unk14 = *(int*) *p_source;
+  this->m_unk14 = *(undefined4*) *p_source;
   *p_source += 4;
 
   this->SetObjectName(*p_source);
   *p_source += strlen(this->m_objectName) + 1;
-  this->m_unk1c = *(int*) *p_source;
+  this->m_unk1c = *(undefined4*) *p_source;
   *p_source += 4;
 
   this->m_unk24 = p_unk24;
diff --git a/LEGO1/mxdsobject.h b/LEGO1/mxdsobject.h
index ff7d4a02..a13f382f 100644
--- a/LEGO1/mxdsobject.h
+++ b/LEGO1/mxdsobject.h
@@ -1,55 +1,59 @@
 #ifndef MXDSOBJECT_H
 #define MXDSOBJECT_H
 
+#include "decomp.h"
+
 #include "mxcore.h"
 #include "mxatomid.h"
+#include "mxdstypes.h"
 
 // VTABLE 0x100dc868
 // SIZE 0x2c
 class MxDSObject : public MxCore
 {
 public:
-  __declspec(dllexport) void SetObjectName(const char *p_objectName);
-
   MxDSObject();
   virtual ~MxDSObject() override;
 
-  MxDSObject &operator=(MxDSObject &p_dsObject);
   void CopyFrom(MxDSObject &p_dsObject);
+  MxDSObject &operator=(MxDSObject &p_dsObject);
 
-    // OFFSET: LEGO1 0x100bf730
+  __declspec(dllexport) void SetObjectName(const char *p_objectName);
+  void SetSourceName(const char *p_sourceName);
+
+  // OFFSET: LEGO1 0x100bf730
   inline virtual const char *ClassName() const override { return "MxDSObject"; }; // vtable+0c
 
   // OFFSET: LEGO1 0x100bf740
   inline virtual MxBool IsA(const char *name) const override { return !strcmp(name, MxDSObject::ClassName()) || MxCore::IsA(name); }; // vtable+10;
 
-  virtual int unk14(); // vtable+14;
-  virtual unsigned int CalculateUnk08(); // vtable+18;
-  virtual void Parse(char **p_source, MxU16 p_unk24); // vtable+1c;
-
-  void SetSourceName(const char *p_sourceName);
+  virtual undefined4 unk14(); // vtable+14;
+  virtual MxU32 CalculateUnk08(); // vtable+18;
+  virtual void Parse(char **p_source, MxS16 p_unk24); // vtable+1c;
 
   inline const MxAtomId& GetAtomId() { return this->m_atomId; }
-  inline int GetUnknown1c() { return this->m_unk1c; }
+  inline undefined4 GetUnknown1c() { return this->m_unk1c; }
 
-  inline void SetUnknown1c(int p_unk1c) { this->m_unk1c = p_unk1c; }
+  inline void SetUnknown1c(undefined4 p_unk1c) { this->m_unk1c = p_unk1c; }
   inline void SetUnknown24(MxS16 p_unk24) { this->m_unk24 = p_unk24; }
 
   // OFFSET: ISLE 0x401c40
   // OFFSET: LEGO1 0x10005530
   inline void SetAtomId(MxAtomId p_atomId) { this->m_atomId = p_atomId; }
 
+protected:
+  inline void SetType(MxDSType p_type) { this->m_type = p_type; }
+
 private:
-  unsigned int m_unk08;
-  MxS16 m_unk0c;
+  MxU32 m_unk08;
+  MxU16 m_type;
   char* m_sourceName;
-  int m_unk14;
+  undefined4 m_unk14;
   char *m_objectName;
-  int m_unk1c;
+  undefined4 m_unk1c;
   MxAtomId m_atomId;
   MxS16 m_unk24;
-  MxU16 m_unk26;
-  int m_unk28;
+  undefined4 m_unk28;
 };
 
 #endif // MXDSOBJECT_H
diff --git a/LEGO1/mxdsobjectaction.cpp b/LEGO1/mxdsobjectaction.cpp
index 990168da..d468f30a 100644
--- a/LEGO1/mxdsobjectaction.cpp
+++ b/LEGO1/mxdsobjectaction.cpp
@@ -3,11 +3,10 @@
 // OFFSET: LEGO1 0x100c8870
 MxDSObjectAction::MxDSObjectAction()
 {
-  // TODO
+  this->SetType(MxDSType_ObjectAction);
 }
 
 // OFFSET: LEGO1 0x100c8a20
 MxDSObjectAction::~MxDSObjectAction()
 {
-  // TODO
 }
diff --git a/LEGO1/mxdsparallelaction.cpp b/LEGO1/mxdsparallelaction.cpp
index 78b9623a..97a8a9d3 100644
--- a/LEGO1/mxdsparallelaction.cpp
+++ b/LEGO1/mxdsparallelaction.cpp
@@ -3,11 +3,10 @@
 // OFFSET: LEGO1 0x100cae80
 MxDSParallelAction::MxDSParallelAction()
 {
-
+  this->SetType(MxDSType_ParallelAction);
 }
 
 // OFFSET: LEGO1 0x100cb040
 MxDSParallelAction::~MxDSParallelAction()
 {
-
 }
diff --git a/LEGO1/mxdsselectaction.cpp b/LEGO1/mxdsselectaction.cpp
index 575aba29..5cae82fb 100644
--- a/LEGO1/mxdsselectaction.cpp
+++ b/LEGO1/mxdsselectaction.cpp
@@ -3,11 +3,12 @@
 // OFFSET: LEGO1 0x100cb2b0
 MxDSSelectAction::MxDSSelectAction()
 {
-  
+  // TODO
+  this->SetType(MxDSType_SelectAction);
 }
 
-// OFFSET: LEGO1 0x100cb8d0
+// OFFSET: LEGO1 0x100cb8d0 STUB
 MxDSSelectAction::~MxDSSelectAction()
 {
-  
+  // TODO
 }
diff --git a/LEGO1/mxdsserialaction.cpp b/LEGO1/mxdsserialaction.cpp
index a5e8f623..46964208 100644
--- a/LEGO1/mxdsserialaction.cpp
+++ b/LEGO1/mxdsserialaction.cpp
@@ -3,11 +3,12 @@
 // OFFSET: LEGO1 0x100ca9d0
 MxDSSerialAction::MxDSSerialAction()
 {
-  
+  // TODO
+  this->SetType(MxDSType_SerialAction);
 }
 
-// OFFSET: LEGO1 0x100cac10
+// OFFSET: LEGO1 0x100cac10 STUB
 MxDSSerialAction::~MxDSSerialAction()
 {
-  
+  // TODO
 }
diff --git a/LEGO1/mxdssound.cpp b/LEGO1/mxdssound.cpp
index 4f2b0d61..30894abc 100644
--- a/LEGO1/mxdssound.cpp
+++ b/LEGO1/mxdssound.cpp
@@ -4,10 +4,10 @@
 MxDSSound::MxDSSound()
 {
   // TODO
+  this->SetType(MxDSType_Sound);
 }
 
 // OFFSET: LEGO1 0x100c9470
 MxDSSound::~MxDSSound()
 {
-  // TODO
 }
diff --git a/LEGO1/mxdsstill.cpp b/LEGO1/mxdsstill.cpp
index 0a5434f1..938afe83 100644
--- a/LEGO1/mxdsstill.cpp
+++ b/LEGO1/mxdsstill.cpp
@@ -3,11 +3,10 @@
 // OFFSET: LEGO1 0x100c98c0
 MxDSStill::MxDSStill()
 {
-  // TODO
+  this->SetType(MxDSType_Still);
 }
 
 // OFFSET: LEGO1 0x100c9a70
 MxDSStill::~MxDSStill()
 {
-  // TODO
 }
diff --git a/LEGO1/mxdstypes.h b/LEGO1/mxdstypes.h
new file mode 100755
index 00000000..6487bad5
--- /dev/null
+++ b/LEGO1/mxdstypes.h
@@ -0,0 +1,20 @@
+#ifndef MXDSTYPES_H
+#define MXDSTYPES_H
+
+enum MxDSType
+{
+  MxDSType_Object = 0,
+  MxDSType_Action = 1,
+  MxDSType_MediaAction = 2,
+  MxDSType_Anim = 3,
+  MxDSType_Sound = 4,
+  MxDSType_MultiAction = 5,
+  MxDSType_SerialAction = 6,
+  MxDSType_ParallelAction = 7,
+  MxDSType_Event = 8,
+  MxDSType_SelectAction = 9,
+  MxDSType_Still = 10,
+  MxDSType_ObjectAction = 11,
+};
+
+#endif // MXDSTYPES_H