I have just had the fortune to have a Park TS-6 in good condition almost gifted to me. The problem is that the top two pieces are missing. They are the small pieces that slide in and out with a paper scale glued to them. The pieces are essentially square tubing about one inch by one inch and are three inches long with cutouts at the end to mount the axle. I think if I can find the tubing I can fabricate my own, but it would be nice to actually have the manufactured ones. I checked the Park web site and wouldn't you know they don't seem to be supplying them to the public anymore ( The TS-6 is the old model that proceeded the TS-7 but it resembles the TS-2 in the majority of constuction except that the arms slide in instead of hinging on the bottom. It is very sturdy and should be a real prize if I can get it working. Any Ideas?