I pitchpoled my boat this year and it turtled. Since then I have had water in my Comptip. I tried all angles and all positions to find a place where it leaked for the water to drain out with no luck. I finally drilled a small hole at the top for the water to drain. I ended up with about a gallon when it was done draining. Now I need to plug the hole. I thought about using a screw with a flat rubber washer or maybe just putting a rivet in. Any suggestions?