We’re building a custom shelving unit specifically for the Stanley FatMax organizer trays. While the trays are stackable, the problem is that if you want to grab one from the middle or bottom of the stack, you have to unstack everything above it. When we’ve got loads to move between the unit and the van for jobs, the last thing we want is to waste time stacking and unstacking trays. This sturdy wooden shelving unit, made from 1 ¼ inch chipboard offcuts, will keep the trays organized and make grabbing or returning them quick and hassle-free.