I know the OP cannot change BB shells so this is a little off topic but having switched from Co Motion to Santana I find there very simple solid aluminum eccentric to be a great idea. Very light and I have less problem with slippage than the stock Co-Motion eccentric. I can also adjust the chain line left and right a few mm similar to a Phil BB. I am not a big guy only about 155 lbs so others may have different results. Very simple design but simple can be a good thing.

Wayne