Ok - I'm going to subject you to another idea, because this one actually seems to be working. I wanted a place to put the daggerboard when launching or beaching. I wanted it out of the cockpit (I need all the room I can get) and puttng it in the 8in. hatch was a nonstarter as it is rather crowded down there (throw bag, pump, emergency paddle, lunch...).
So here it is:
I installed a couple of rivet nuts in the rear aka, screwed in some eyelet posts, and attached a bungie loop. I was planning on rivetting a strap to the diagonal brace (I like the tramps to be over the brace, so no eyelet posts there), but I stumbled on the idea of using the daggerboard's built-in bungie to hold that end. Actually, I'm embarassed to have to admit that the built-in bungie part carries most of the load, and I probably could have done something simpler on the rear aka. Oh well, hindsight is 20-20.
The eyelet posts are carefully placed so as not to interfere with the tramp straps. In retrospect I wish I had placed them a bit closer together, to reduce lateral "play," but that's a trivial matter. The only real downside I can see is that the daggerboard would get in the way of a "Slaughter-style-continuous-sheet-furling-line" block if it were attached where the brace is bolted to the aka, as Slaughter does it:http://www.hobiecat.com/community/viewtopic.php?f=69&t=21927&p=97998&hilit=cockpit#p97998
I wanted to try that next. To get 'round that problem I'm going to see if I can't make use of a Davis "Quick Fist" pole mount that failed to solve the problem I bought it for, but should work as a light-duty aka mount: