Ordering an AP CB70 rack.... RHP or flexwatt?

I've done some research but I can't find details on how the rhp is/are arranged in the CB70 AP rack.

My 5 ball pythons are all in terrariums right now and it just taking up too much space as I want to get a few more and breed for my own interests to make cool morphs to keep. Not looking to become a vendor or try to make any kind of money. Maybe trade with like minded hobbyists?

Anyways. I've decided on the iris CB70 AP rack and have my vision tubs on the way.

Just need help on which heat option to choose.

I use the 3 inch belly heat on all my CB 70 racks. It provides a nice hot spot for belly heat and leaves plenty of room for a cool side as well. The belly heat is not going to raise ambient temps but it will not lower humidity much either.