Mary-
Hmm, the boards are only down a few inches at most with the current system- You could either raise up the little "eye" on the deck a couple of inches, round off the front of your boards (separate set of boards?), route out the "groove" and drill a new hole so the current system would raise them enough, or put a "weedless" type SS "spring" (along the lines of weedless fishooks) on the bottom of the hull sticking down just far enough to keep the weeds/clear the weeds off the few inches not drawn into the well.

Kirt