viewtopic.php?t=1256Discusses a possible alternate source of a leak.
Unfortunately I couldn't open any of the external links, but the "nipple" fix is standard DSII lore and you should find plenty of discussions here in the older posts.
I've only ever sailed on someone else's DSII but the amount of water that got pumped along the uphaul was prodigious. Any leaks in the connection between CB trunk and the opening into the cuddy will definitely be noticeable.
Good luck and have fun spelunking in the old posts.