The covers come without any kind of fasteners. I'm thinking short brass woodscrews along with marine silicone seal. Any better ideas?
I've used small stainless steel screws (I think they were #8 x 1/2") and marine sealant (3M 5200). No problems so far. Also, the large yogurt containers fit snuggly inside the port - I've used them as covers during storage with screen covered holes cut in to allow air circulation.
Mihai
Thanks, I ended up using #8 x 1/2" brass screws and the marine sealant. Great idea about the large yogurt containers. I had planned to just leave the covers loose, but then would probably forget to tighten them before using the boat. This way it will be obvious. I think I'll just punch a few small holes in the container bottoms.