Very nice design.. I'm using something similar, although I'd never thought about turning the tubs sideways and strapping them down.

I'm breeding mice currently, would the same 35qt Sterilite tubs I'm using for them work for ASF's also? I would assume so, since they're not much bigger.. I'm doing 1.3 right now with mice, will be going to 1.4, maybe 1.5...