I'm using OEM everything.

I had a bunch of bolts around the shop today (all shimano cranks) and was measuring them. The longer the bolts the less torque they could handle. The longest bolt broke before 80 inlb. The shortest bolts could handle the 125inlbs. That's what got me onto the bolts-are-stretching theory. We are talking ten-thousandths of inches here, not much. This could also just be from the manufacturing process, but it sure seemed to be a trend this afternoon.

I'll buy a new bolt set from LBS and Loctite them in, maybe physically marking them as well. That'll show if they're actually rotating. I'm not totally convinced, but it could be precession of the ring is putting a different load on the bolt as well, causing them to break when re-torqueing.

Matt