My super cheap coolerdor build

I was going to use Type III silicone but I didn't want to wait for it to dry and outgass any nasty smell. I thought about screws but I wasn't sure how well they would work. I may still try it or I may pick up some of the Spanish Cedar trays first and then cover the sides of the cooler to make them a semi custom fit. Eventually I want to get 3 trays and build the sides in to size. Then the the top tray can sit on cleats and slide back and forth. That way I have plenty of room for organization but I can see anywhere with out pulling out the top tray. Then again if I go through all of that I may just want to get a nice wooden humidor.