Is there anything unique about the pivot bolts in the Hollowpoint? I've had a few of them off and they look like something you could find at a hardware store. I guess my question is that if I snap a bolt will I be able to hit the hardware store up for a replacement or will I have to wait to get one from IH? Any other critical pieces that might fail (besides the derailleur hanger). If there are things that I can only get from IH, I'd rather order spares and have them ready to go, than wait for something to break...