I'm planning on building a cage/rack system modeled after a barrister book case. It's going to be built from 3/4 inch plywood so heating through it is not an option. I was trying to find a way to use flex watt but I'm getting mixed answers on whether I can use it INSIDE an enclosure. Basically I need an idea on how to heat the enclosures. Preferably without drilling hundreds of holes in my piece.