I just installed a 2007 SL-K (double) with Mega Exo BB to manufacture's specs. Somehow, the non-drive side crank arm is 2.2 mm further away from the bike midline than the drive side. I did not have this problem with Ultegra Hollowtec. The bb shell is within 0.2 mm of 68mm.
It seems the issue is with the non-drive BB cup, which does not thread in to being completely snug with the frame. Is this how the BB is designed? It seems possible that the middle spacer is too long and prevents the non-drive BB from threading fully into the shell. I'll check this when more loctite 241 arrives.
Any other suggestions?
Anyone else deal with this issue?
FSA has not been helpful.