Steve's numbers don't seem unreasonable, to me.
When I retired, in 98, Fanuc, of Japan, was guaranteeing repeatability within .0001" (1/10000), and the high end boys were looking to .00001" (100/1000000). I'm surprised to hear that the government isn't ashing for even tighter standards, by now.
All in all, for a home brew, it's a very impressive piece of equipment. I know of few machine shops, that wouldn't be proud to have that thing out in the shop.
I'm very impressed, Steve. I wouldn't have believed, that a tool of that precision, could be produce by anyone other than a machine tool manufacture. I envy you, your talent and expertise.
Well done, now I know how you make those little bitty, tinnie-tiny, exquisite parts.
This reminded me of something, else.
I have all sorts of drawings and pictures of diesel boats. Including, but not limited to, the tech manual on the Type 8 (navigation) periscope.
If anyone needs anything, info, drawings or pictures, you can ask here, or Email me directly. I'll be happy to share anything I have with anybody that needs it. Most of it is on Balao and Tench class boats, but I do have some Gato info.
Mike <mkeatingss#cox.net > just change the # to @
I don't suffer from ulcers, I'm a carrier.