My main leaking points are in the inside corners of the cabinet. The panels overlap in these corners, and although there is a weatherstripping seal on the bottom panel, sand goes through the overlap and down the legs onto the shelf-like panel that is attached between all of the legs. So i get media piles in each corner of this shelf and it piles up against the legs. I also get dust flying out of every panel overlap, but that is because i haven't hooked up my shop vac to get rid of the interior dust.