I have small C clamps, 4 on each lid, (not shown in photo) but once I have the full rack finished I wont need the lids any more. just slide out, feed, clean or check on the snakes then slide back in.
Right now I just want it finished... with having the tubs stacked the way they are it is hard moving them with out help or not having to change the news paper from the water bowl spilling each time I go to check on them.