I recently purchased a Powered Convoy Cab only, and wanted to see if it was an original versus a reissue. The only thing I think might be different is the peg on the smokestacks. Does the reissue have a square peg that attaches the stacks, or a round peg? I have attached a picture of what I mean. If anybody has one open and can check , or if you know of any other way to tell the difference between them, I would appreciate the input. Thanks