diff --git a/LEGO1/act3.cpp b/LEGO1/act3.cpp
index eca84fbf..3d152bfc 100644
--- a/LEGO1/act3.cpp
+++ b/LEGO1/act3.cpp
@@ -1,5 +1,7 @@
 #include "act3.h"
 
+DECOMP_SIZE_ASSERT(Act3, 0x4274)
+
 // OFFSET: LEGO1 0x10072270 STUB
 Act3::Act3()
 {
diff --git a/LEGO1/act3.h b/LEGO1/act3.h
index f2883e63..6bef1711 100644
--- a/LEGO1/act3.h
+++ b/LEGO1/act3.h
@@ -29,6 +29,7 @@ class Act3 : public LegoWorld
   protected:
     undefined m_unkf8[0x4114];
     MxEntity *m_unk420c;
+    undefined m_unk4210[0x64];
 };
 
 
diff --git a/LEGO1/helicopter.cpp b/LEGO1/helicopter.cpp
index 5c80aba0..04195407 100644
--- a/LEGO1/helicopter.cpp
+++ b/LEGO1/helicopter.cpp
@@ -5,6 +5,8 @@
 #include "legogamestate.h"
 #include "legoworld.h"
 
+DECOMP_SIZE_ASSERT(Helicopter, 0x230)
+
 // OFFSET: LEGO1 0x10001e60
 Helicopter::Helicopter()
 {
diff --git a/LEGO1/helicopter.h b/LEGO1/helicopter.h
index a106a373..61cbd2cb 100644
--- a/LEGO1/helicopter.h
+++ b/LEGO1/helicopter.h
@@ -29,7 +29,7 @@ class Helicopter : public IslePathActor
 
   // OFFSET: LEGO1 0x10003210 TEMPLATE
   // Helicopter::`scalar deleting destructor'
-  virtual ~Helicopter(); // vtable+0x0
+  virtual ~Helicopter() override; // vtable+0x0
 
 protected:
   MxMatrixData m_unk160;
@@ -42,7 +42,7 @@ class Helicopter : public IslePathActor
   MxAtomId m_unk22c;
 
 private:
-  void Helicopter::GetState();
+  void GetState();
 };
 
 #endif // HELICOPTER_H
diff --git a/LEGO1/islepathactor.cpp b/LEGO1/islepathactor.cpp
index 16db14e3..e2b6a6ee 100644
--- a/LEGO1/islepathactor.cpp
+++ b/LEGO1/islepathactor.cpp
@@ -11,6 +11,7 @@ IslePathActor::IslePathActor()
   this->m_unk158 = 0;
 }
 
+// OFFSET: LEGO1 0x1001a280
 MxResult IslePathActor::InitFromMxDSObject(MxDSObject &p_dsObject) {
   return MxEntity::InitFromMxDSObject(p_dsObject);
 }
\ No newline at end of file
diff --git a/LEGO1/islepathactor.h b/LEGO1/islepathactor.h
index 902cfe04..be10d349 100644
--- a/LEGO1/islepathactor.h
+++ b/LEGO1/islepathactor.h
@@ -27,7 +27,7 @@ class IslePathActor : public LegoPathActor
 
   // OFFSET: LEGO1 0x10002ff0 TEMPLATE
   // IslePathActor::`scalar deleting destructor'
-  inline virtual ~IslePathActor()
+  inline virtual ~IslePathActor() override
   {
     IslePathActor::Destroy(TRUE);
   }