I'm considering giving up on the oh so elusive TH400 203. The TH350 203 is much easier to find and, if something like the adapter breaks, much easier to find parts for. If any of you local guys run accross a rebuildable TH350 with 203 behind it for cheap, let me know... I've heard many times that a TH350 can be built almost as strong as a TH400, but I have no idea what is involved. What are the major points to improving a TH350???