I built this over a year ago and just now got to posting pics.
I raised 4 litters in this with no problems, only stopped cause my freezer is overflowing but will be using it again when I need to breed more. So it had rats in it for about 5 months.
No chewing cause the mesh fits tight to the tops of the drawers.
Never had an issue with humidity either, I use a mix of wood pellets (Dry Den) and shavings. I cleaned once a week to prevent urine build up cause that's bad no matter what kind of container you use.
Anyways, you can't see it from the pics I have but I've melted 5 rows of holes and inch apart all the way around the drawers. And like I said never had an issue.
Thanks for the concern though![]()