Shelmily just finished building his field sinks with a few modifications and did an awesome job on them too. Check out his thread here On that note, I've found that PL Premium and Gorilla Glue don't adhere well to the polyethylene plastic used in my Sportsman's Trunk. Consequently, the expanded styrofoam "countertop" I made isn't holding up very well. There's just too much flex in the lid and the edges of the lid keep separating from the styrofoam and glue. Additionally, the self-adhesive tiles are not sticking to the styrofoam in the lid. They're meant to be face up when installed and they're upside down when the lid is closed. I plan to use RPX (Rigid Extruded Foam) insulation with some turn-in plastic wall anchors around the edges. Then I'll just turn in some screws around the edges of the lid to add some rigidity to it. I'm also planning to redo the deck that suspends the sinks using the same materials. In the end, the sinks won't require any sealants, the whole thing will be pretty much impervious to water damage and it'll be about 10 pounds lighter. It's all good, right?