OK, so the main objective was to secure the box best as possible with minimal OEM alteration. I wanted to be able to remove box and reinstall rear seat and maintain stock tub with no drilling or thru bolting requiring dropping fuel tank and welding nuts. Once finished, I realized cosmetically it doesn't look half-bad. Basically mounted 3/4 solid plank using existing Jeep tie downs brackets, bolt holes, then mounted box to plywood.Covered with original exisitng OEM carpet. Dual cable locks for added security. Snagged a cheap WRANGLER decal from Amazon as a finishing touch. Looks much better than I planned!