What do I need? Do I need to insulate the sides? Should I remove the door and put a heavy Plexiglas one on? Should I drill holes in the shelf to let air pass through? Should I tape or fill the slot in the top shelf and drill holes in it to let air pass? The sides are either 3/4 or 5/8 inch thick. The stuff lining the wood is washable, I don't know what it is called. Top through the Plexiglas. Top inside. Top inside. Front. Front with door open. Back. Right side. Left side.