new truvativ isis bb fitted a few weeks ago to my 456 with raceface cranks ( old but good ). after a couple of hard rides they developed a bit of a creak so went to tighten up bolts and the hex head on the driveside bolt fell apart leaving me with no way of tightening or removing the bolt. As it is a hardened bolt It is proving very difficult to drill out so It will be taking a trip to the local engineering shop to be machined out. what a complete and utter pain in the arse caused by a pesky faulty bolt.
deep breaths , deep breaths……… ahh thats better.

1/10

please try harder

I think the quicker you accept that you are wrong the better it will be for everyone concerned.

Remove the hams from your fists.