Yo - I've got the MB-4, it's nice. Was a '92 when they were making the lower-end frames in Tange= pretty light.

Went to the town dump swap shop today and picked up some wheels with freewheels/cassettes on them to throw on and try to figure out a good gear ratio, as well as some freebie pedals and other random stuff. I've got a 36 chainring on the crank and so far I've only tried the 14 and 17 cogs on one of my dumpstered wheels. 36x14 feels too tough, the 17 feels better, I'm just curious what you all use for a SS ratio, and for what kind of riding. Right now the bike has semi-slicks on it, as I'm planning to do mostly road-riding with maybe a little bit of off road once in a while. Maybe I'll get into riding trails and scrounge some nubbier wheels, I don't know.
-marcus
p.s. pics soon