diff --git a/LegoBlobReader/LegoBlobReader.cpp b/LegoBlobReader/LegoBlobReader.cpp
index 17e61ca..ce3558f 100644
--- a/LegoBlobReader/LegoBlobReader.cpp
+++ b/LegoBlobReader/LegoBlobReader.cpp
@@ -220,6 +220,7 @@ static void ParseBuffer(BinaryReader& reader)
 
     // read class infos
     uint32 class_block_size = reader.read<uint32>(0); 
+    uint32 end_of_class = reader.get_read_offset() + class_block_size; 
     std::string classlist = reader.read_string(); 
     uint32 class_count = reader.read<uint32>(0); 
 
@@ -275,6 +276,11 @@ static void ParseBuffer(BinaryReader& reader)
         }
     }
 
+    uint32 end_of_classes = reader.read<uint32>(0); // 1?  Not sure what this is, but need it to match the offset the class block
+                                                    // if this was the start of another class - it would be the class size, which I take to mean '1' means stop
+
+    printf("\n\n-=-=-=-=-\nSANITY - %u == %u\n-=-=-=-=-\n\n", reader.get_read_offset(), end_of_class); 
+    
 
     DisplayProgress(reader); 
 }