yeah, I was debating whether or not to put a sheet in the back of my rack. but then i thought 1) they will be in tubs, 2) the rack will be against a wall. i think those two points addresses heating/humidity and security, but going the extra step is to providing a fully enclosed space provides extra assurance.

u should provide a DIY/how to how the on-off toggle switches. i would love to know how to add that to my next rack when my BP's outgrow this one.