Just wondering if you've made any headway? I'm curious what Cecil recommended? Also, you might try talking with Todd at Cape George Marine Works. What ever you do, it seems important to get the weight in the right place. I'm finishing a CG 38 which has the ballest low and below the fuel/water tanks. I would need to tear the boat apart to get to the ballest area. I think, with proper design, a through bolted solution would be the direction I would head.
Bill
Bill