Funky modern cube shelf that has hidden screw slots for bracket-free invisible mounting. Print several for a creative look to display your favorite 3D prints, photos, or ornaments. Filenames are the exterior dimensions (W x H x D), all the borders are 20mm thick. Screw 2x screws 125mm apart (for 145mm wide), or 175mm apart (for 195mm wide ones) leaving ~4mm of gap below the screw head. Slot the shelf over the screws and slide down to lock in place.