diff --git a/src/tools/pcb_reader/cache.h b/src/tools/pcb_reader/cache.h
index 3821fd07..b9f79226 100644
--- a/src/tools/pcb_reader/cache.h
+++ b/src/tools/pcb_reader/cache.h
@@ -65,8 +65,20 @@ public:
     return pFile;
   }
 
+  void purge()
+  {
+    std::scoped_lock lock( m_mutex );
+    _purge();
+  }
 
 private:
+  void _purge()
+  {
+    m_lgbCache.clear();
+    m_sgbCache.clear();
+    m_pcbCache.clear();
+    //std::cout << "Purged PCB/SGB/LGB cache \n";
+  }
   template< typename T >
   std::shared_ptr< T > loadFile( const std::string& filepath )
   {
@@ -80,10 +92,7 @@ private:
         m_totalFiles++;
         if( m_totalFiles % 1000 == 0 )
         {
-          m_lgbCache.clear();
-          m_sgbCache.clear();
-          m_pcbCache.clear();
-          std::cout << "Purged PCB/SGB/LGB cache \n";
+          _purge();
           m_totalFiles = 1;
         }
 
diff --git a/src/tools/pcb_reader/exportmgr.h b/src/tools/pcb_reader/exportmgr.h
index c448b5d2..5d378e59 100644
--- a/src/tools/pcb_reader/exportmgr.h
+++ b/src/tools/pcb_reader/exportmgr.h
@@ -32,14 +32,17 @@ public:
 
   void exportGroup( const std::string& zoneName, const ExportedGroup& group, ExportFileType exportFileTypes )
   {
-    if( exportFileTypes & ExportFileType::WavefrontObj )
+    m_threadpool.queue( [zoneName, group, exportFileTypes]()
     {
-      m_threadpool.queue( [zoneName, group](){ ObjExporter::exportGroup( zoneName, group ); } );
-    }
-//    if( exportFileTypes & ExportFileType::Navmesh )
-//    {
-//      m_threadpool.queue( [zoneName, group](){ NavmeshExporter::exportGroup( zoneName, group ); } );
-//    }
+      if( exportFileTypes & ExportFileType::WavefrontObj )
+      {
+        ObjExporter::exportGroup( zoneName, group );
+      }
+      if( exportFileTypes & ExportFileType::Navmesh )
+      {
+        NavmeshExporter::exportGroup( zoneName, group );
+      }
+    });
   }
 
   void waitForTasks()
diff --git a/src/tools/pcb_reader/lgb.h b/src/tools/pcb_reader/lgb.h
index d59feb2c..b363dcb3 100644
--- a/src/tools/pcb_reader/lgb.h
+++ b/src/tools/pcb_reader/lgb.h
@@ -335,7 +335,7 @@ struct LGB_GROUP
             entries.push_back( std::make_shared< LGB_EOBJ_ENTRY >( buf, entryOffset ) );
             break;
           case LgbEntryType::CollisionBox:
-            entries.push_back( std::make_shared< LGB_COLLISION_BOX_ENTRY >( buf, entryOffset ) );
+            //entries.push_back( std::make_shared< LGB_COLLISION_BOX_ENTRY >( buf, entryOffset ) );
             break;
           default:
             //std::cout << "\t\tUnknown SGB entry! Group: " << name << " type: " << ( int )type << " index: " << i << " entryOffset: " << entryOffset << "\n";
diff --git a/src/tools/pcb_reader/main.cpp b/src/tools/pcb_reader/main.cpp
index 0856e7e5..d4eab40b 100644
--- a/src/tools/pcb_reader/main.cpp
+++ b/src/tools/pcb_reader/main.cpp
@@ -206,6 +206,7 @@ int main( int argc, char* argv[] )
     zoneDumpList.emplace( zoneName );
   }
 
+  int zoneCount = 0;
   for( auto zoneName : zoneDumpList )
   {
     try
@@ -495,7 +496,8 @@ int main( int argc, char* argv[] )
         }
       }
       exportMgr.exportZone( exportedZone, static_cast< ExportFileType >( exportFileType ) );
-
+      if( zoneCount++ % 3 == 0 )
+        pCache->purge();
 
       printf( "Exported %s in %lu seconds \n",
         zoneName.c_str(),
@@ -508,6 +510,7 @@ int main( int argc, char* argv[] )
       printf( "Usage: pcb_reader2 territory \"path/to/game/sqpack/ffxiv\"\n" );
     }
   }
+  pCache->purge();
   exportMgr.waitForTasks();
   std::cout << "\n\n\n";
 
diff --git a/src/tools/pcb_reader/nav/TiledNavmeshGenerator.cpp b/src/tools/pcb_reader/nav/TiledNavmeshGenerator.cpp
index 55f00c19..a120d116 100644
--- a/src/tools/pcb_reader/nav/TiledNavmeshGenerator.cpp
+++ b/src/tools/pcb_reader/nav/TiledNavmeshGenerator.cpp
@@ -87,14 +87,19 @@ bool TiledNavmeshGenerator::init( const std::string& path )
 
 TiledNavmeshGenerator::~TiledNavmeshGenerator()
 {
-  if( m_mesh )
-    delete m_mesh;
-  if( m_chunkyMesh )
-    delete m_chunkyMesh;
+  delete m_mesh;
+  delete m_chunkyMesh;
 
-  if( m_ctx )
-    delete m_ctx;
+  if( m_triareas )
+    delete[] m_triareas;
+  if( m_solid )
+    delete m_solid;
+  delete m_ctx;
 
+  rcFreeContourSet( m_cset );
+  rcFreeCompactHeightfield(m_chf);
+  rcFreePolyMesh( m_pmesh );
+  rcFreePolyMeshDetail( m_dmesh );
   dtFreeNavMesh( m_navMesh );
   dtFreeNavMeshQuery( m_navQuery );
 }
diff --git a/src/tools/pcb_reader/navmesh_exporter.h b/src/tools/pcb_reader/navmesh_exporter.h
index 79608607..29e4cecd 100644
--- a/src/tools/pcb_reader/navmesh_exporter.h
+++ b/src/tools/pcb_reader/navmesh_exporter.h
@@ -27,14 +27,14 @@ public:
 
     auto dir = fs::current_path().string() + "/pcb_export/" + zone.name + "/";
     auto fileName = dir + zone.name;
+    auto objName = fileName + ".obj";
 
     std::error_code e;
-    if( !fs::exists( fileName, e ) )
+    if( !fs::exists( objName, e ) )
       ObjExporter::exportZone( zone );
-
+    {
     TiledNavmeshGenerator gen;
 
-    auto objName = fileName + ".obj";
     if( !gen.init( objName ) )
     {
       printf( "[Navmesh] failed to init TiledNavmeshGenerator for file '%s'\n", zone.name.c_str() );
@@ -48,6 +48,7 @@ public:
     }
 
     gen.saveNavmesh( zone.name );
+    }
 
     auto end = std::chrono::high_resolution_clock::now();
     printf( "[Navmesh] Finished exporting %s in %lu ms\n",
@@ -64,15 +65,15 @@ public:
 
     auto dir = fs::current_path().string() + "/pcb_export/" + zoneName + "/";
     auto fileName = dir + zoneName + "_" + group.name;
+    auto objName = fileName + ".obj";
 
     std::error_code e;
-    if( !fs::exists( fileName, e ) )
+    if( !fs::exists( objName, e ) )
       ObjExporter::exportGroup( zoneName, group );
 
 
     TiledNavmeshGenerator gen;
 
-    auto objName = fileName + ".obj";
     if( !gen.init( objName ) )
     {
       printf( "[Navmesh] failed to init TiledNavmeshGenerator for file '%s'\n", fileName.c_str() );