Assuming your intent is to hold the daggers in an intermediate position. Any reason the little squeegees like used on the Tiger wouldn't work?
take some PVC pipe a little longer than the daggerboard is wide. Cover it with pipe insulation. Run a bunji through the PVC and tie each end of the bunji back to the trampoline / deck area (my 5.2 trampoline had grommets for the bunji - I think my 6.0 had eye straps on the inner edge of the deck (or maybe it was viceversa). You put the PVC on the outboard side of the board so it pulls the board inward toward the trampoline and keeps it at whatever position you put it. Most reliable system I've ever had!
