I taught they were already upside down.

There is only eucaboard at the bottom.

If you flip it, you have plastic on top, and eucaboard at the bottom.

The only rack I was able to find, at some holes in them. But I taught of using some mesh or screen on it. That will prevent escapes and would help with humidity probably, since my humidity levels are too high.

Will see what I decide in a few months....