OK, rivet, thanks for filling me on on that. For some reason, probably no reason, I had it in my mind that it was a field mod. I too well remember a photo of a very late KT with this system on it, but it was some time ago, before I moved here, and if I saved that photo, it was on the computer that was deep sixed before the move. Thought I had all the tank related stuff on a disc, but obviously not. If you run across the photo, would you mind popping it to me in an email?