I recently bought a '96 Cannondale RT 2000 Tandem. The eccentric adjuster on the Captain crank seems to be frozen. I loosened the allen screw on the timing chain side and it still wont budge. Is there something else I should know? Is there a way to knock it apart to clean it? I presume it would mean taking the bearing out first, But I've never messed with a "bottom bracket" before so I'm not sure how to do it? Any help would really be appreciated!