Drilled eight 1/2 inch holes today for mounting the cooler seat
It looks like the deck has wood inside, so I will seal the holes with epoxy resin first. Bought a Western System epoxy kit from west marine. Hopefully it will have enough resin for my purposes - I will have about 25 holes on the boat.
Earlier I also drilled a few small 'exploratory holes' to find out how much space I have under the deck. So I need to seal them with epoxy and fill with 3M 5200
Here's the cooler seat
I'll mount it using these toggle bolts, as recommended by the owner of defender.com
They take 1/4 inch bolts. Hopefully will be enough for the seat.