why didn't you just do a scupper valve or oneway valve. it does all that and always drains the hulls so you only need a bilge pump on when your dead in the water. i never run my pump, not even in daytona, but i never lost my ski either, just rolled around with it a bit. with your drain i would be worried about running it without the plug unless you keep it in you pocket or its on a little chain. if you where dead in the water it would let water in pretty quick, almost as fast as the bilge could pump. just my thoughts on it. you did an awesome job on the foam, your ski should stay un water logged for along time.