So i am building up an IRO mk V. I got a miche bb and sugino zen messenger cranks. Last night i installed the bb and cranks and after i was done, i spun the cranks around to make sure everything was hunky-dory. When i spun it around there was a rubbing sound, and then the cranks would stop. I was once per rotation, and there was definitely more friction than there should be.
I might have tightened the bb cups too much, but other than that i cannot think of anything.