Silica tray for Lack enclosure dry box

There are quite a number of silica trays for the dry boxes available, but they either don't hold the silica when opening the top of the enclosure or they didn't print well. So I constructed a new one with one side holding back the silica beads when opening the enclosure, but making sure that this heightened side doesn't increase tension on the filament. The tray also has two cavities for screws (if you want to attach the dry boxes to the Lack table with screws). And fillets, so the beads don't move all the way around. The height of the fillets is adapted to not interfere with the spools.