I only have a couple ASF eaters, so I breed/raise mine in tanks with no worry of over producing, but I have had rats chew through the cheap mortar tubs, so I am looking around to build new racks. I may go with the normal home made design, and just customize the measurements to hold Lexan containers. I use them all the time in my line of work, and that stuff is as near indestructible as anything I've seen.