BB height: I briefly stoked for a Cat 1 on a pretty new Cdale. We were testing to see if we would have a chance in a 100 y/o class. Anyway, we pedaled through some turns on the flat and had the tail hang out a couple of times when my pedal hit the ground. We were going pretty good. IIRC it was only my pedal that grounded, maybe the stoker's BB being lower, incorrectly assuming that the stoker cranks would be shorter? In any case, we weren't that close to the adhesion limit and were glad our BBs were no lower.