Some good info on Sekai here.... http://www.classicrendezvous.com/Japan/Sekai_main.htm
and here.... http://www.bikeforums.net/showthread...sekai+database

I had a bit of trouble getting the chain to move on to the large ring after re-installing the crankset but I think I have resolved that. I have not had it out for a shakedown yet.