So (cutting to the chase): the reason the starboard hull looked like it was moving independently the other day was because the forward inboard bolt holding the hull to the crossbar is gone. Not sure how or when, but I'm not sure whether in replacing it I need to order the "kit" ($89) that includes a casting; or if i can get away with just the bolt, nut, and washer. My expert (Bob Bergstedt) has never dealt with this before but was not able to get a bolt started in the crossbar, but could not tell if there was a piece broken off in there.
If anybody has any experience or insight on this, please chime in!
Thanks,
Peter