I posted this question before I read the building of Longshot. I think that the skeg that you were working on is somewhat similar to what I am attempting to do. I now have two concerns on my plans, one the sealing and adhearing of the skin around the mirage drive hole. Tonight I ordered the poly from you and will do a test on the plywood when received. The second concern as you noted of the hard edge of the partial plywood bottom. I am planning on adding a piece of plywood at a slight angle in front of the hard edge to lessen the impact of the hard edge striking an underwater object.
It wasn't clear to me how you were going to seal the skin to the skeg housing, could you briefly describe your plan?
Thanks for your help,
Don