I am wondering what will heat inside the tubs better bottom heat or back heat. I was thinking of using bottom heat and using the same size of flexwat in every shelf. I think I would have to make grooves in the shelves for the wires. Does the tubs rubbing on the flexwatt wear it out fast?

Also what size of tub do I need for an adult female? I want to make sure it is big enough for any ball python. I will work out my plan for smaller tubs later.