I welded up a metal frame and had some extra diamond plate laying around and put a locking latch on mine so I can secure my valuables laptop,gun, binocs etc..... I installed the quick release kit for the freezer/fridge so it pulls out easy. I coated the frame and case assembly with herculiner nothing slides around on top at all. I found a old "plastic "suitcase that fit on top of the drawer unit to fit all my off road equip in air compressor, straps chains, tire repair kit etc.... that way its all in 1 place , easy to offload and store .