Thank you so much Deborah for this awesome DIY! I built two of the rat racks about a month ago and love them. One is in use for rats, and the other for mice & ASF's (I used 1/4 wire instead of course). I like the larger tubs so decided to just build the rat rack for my mice too.

Since the tubs are so deep I built little hardware cloth ladders for the mice to get to the food, they fold up flat and don't catch on the tubs so it doesn't pose a problem at all.