Hi Dave, you have a better memory than me, yes I have a pair of H6's that must have been used in TKM2. I did find a single H5 though, I would have to dig out some instructions to make sure it still works though. As for your other thread, the regulator is a 15V low drop out type and is generally available. Technobots do the 5V and 12V versions but not the 15V one although I can get them. You just need to source a LM2940CT-15.

I think I need a clear out as I seem to have quite a few spare bits in my personal stash, even the odd new Roboteq or two!