Some of you may have read about my awful experience with repti-racks, and with everything that happened, I really don't trust anything the guy told me when I was ordering. He told me this setup would be ideal for balls, but I just don't believe him. Starting with the fact that I had to punch two dozen holes in each of these "ready to go cages" just to get the humidity right. Anyway, just need some advice / double checking with my heating setup. When I had these guys in glass tanks, I had everything dialed in perfectly, between lamps and heat pads. The current setup is totally new to me. Here's what I have:

Five 48 x 24 x 12 plastic cages, with acrylic front doors. Each cage is split in two down the middle. For each cage I have two 11 x 17 Ultra Therm heat mats from Bean Farm.

They are the only source of heat. First question, is this enough to heat the cages? Secondly, unlike the zoomed mats I was used to, in the manual for these it states that they are self regulated and don't go above 95. However just to be safe, I have them running off of a Herpstat 4. Also in the manual, it says to use a polystyrene insulation on the outside of the mats to focus the heat into the cage. Now, (and feel free to laugh,) I have no clue what polystyrene is. I'm not the handiest person in the world. Heh. Is it necessary for me to add it? In the manual it says that without it, the mats will heat equally up and down. Could this be beneficial for my setup, since the cages are stacked on top of each other, and that way the tops and bottoms would be heated? If so, should I get two more mats for the top of the topmost cage to sandwich it as well?

I've spot checked the inside with my IR gun... The hotspot is right where it should be, and the gradient is fine as well. I'm just concerned about ambient air temp inside the cages. Sorry for the length of the post, just not used to heating without lamps. Would appreciate any advice.