Sorry for resurrecting this but I figured it might be better than starting a new thread.

I've noticed that the crank has a tendency to wobble back and forth, side-to-side, while I am pedaling. I thought that maybe the crank arms weren't on tight enough but I can't tighten the nuts any more than I have. So I'm not sure what is up there.

I am also having problems with braking. When I try to stop I feel like it takes a lot of squeezing the brakes to get me to stop, and afterwards my front brake calipers don't return to position without a little help from me.

Any suggestions or ideas?