i'm pretty sure the bmx microdrive thing started with Profile. the small freewheels actually came after--as a cheap alternative to having a Profile cassette hub.you sure about that 34-12, because afaik they never had a 12t freewheel only 13t(ran one 36-13) and for a long time 14t was the smallest you could get.
this whole no seat thing smells like another demo 9 trolling.