Dude, that's a neat bike.
Have you tossed your "calipers" yet. "+\- 0.1mm accuracy
" (sic) is 8-thousanths of an inch. That's a mile. They're no good for measuring much of anything.
Recently bought a digital vernier for knocking around the garage (ie: I'd never take it to work) and it's accurate to within 0.0005" (1\2 a thou). I paid $15 for it. No kidding.
Keep posting pictures. You've got a really neat bike there.