Cannondale eccentric BB
I have a new-to-me Cannondale tandem, probably vintage 2010 - disc brakes and 700c wheels. I'm trying to eliminate sync chain slack but I cannot figure out how to loosen the captain's bottom bracket. The 4mm bolt will back completely out, so I'm guessing the locking clip is AWOL. I've read posts here that all say to loosen the 4mm bolt and smack it with a mallet but that did absolutely nothing - it still won't budge.
Any other suggestions? It seems to me I should have to remove the cranks too - am I wrong about that?
Thanks in advance!