SM...your idea is good, up until you used resin without any filler, or better yet fiberglass strands for reinforcing. I've told many people over the years to never make a fix without some type of material in the resin. The reason for this is w/out material to add strength to the resin it will most likely crack & chip off when it gets hit with the tiller or when the rudders are moved around, like in your cat box. Send me your email address to
[email protected] and I can send you back some photos of what I'm talking about.