If the mesh is too hot to touch I'd not do that. I have a vision which looks very similar to yours. The ambient temps are a bit of a pain if you are not heating the room. I run uth on mine (I actually use two one hot one cool) but the ambient temps are taken care of my a fluorescent light inside the enclosure. It is on for 12 hours but it takes 3-4 hours for the ambient temps to cool down. The uth keeps it from being very cool then in the am the fluorescent light comes on again.

Here are what my temps recorded yesterday... the surface temps are basically constant 80/90ºF so this is ambient air temps I am speaking about, the room where this enclosure is was about 74-7 day and 70-68 night.

10am 80ºF
2pm 85ºF
4pm 84ºF (room temps dropping)
8pm 82ºF
2am 80ºF
5am 78ºF (coolest of the day)

I did not alter the venting on the enclosure at all. It is as it came I do use a humidifier in the room so the room stays at around 60% most of the time (53%-70% kinda range) I adjust the rate on it every few days. It is no big deal.

I hope my experiences helps some...