Threw together a FB10 rack, cant decide on belly heat or back heat

[Painted]

The shelves are melamine cut off of a 4'x8' piece. The sides are osb plywood. I use osb on the sides because it is cheaper, lighter, and easier to get. But I always make sure that the shelves that the snakes will be in contact with are melamine. Thanks


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Thanks, I really appreciate it!