Hello everyone!

It has been exactly one week since I purchased my first snake. A young Ball Python. I am not yet sure of the sex, or weight at this time. It is 18" long and was born this year, it is a CH. He was stressed when he came home last Friday but has become very comfortable in a short time. I have been handling him for very short periods, and last night he ate his first meal in his new home. It was a live hopper mouse which was offered with tongs, he smashed it and ate it right up!

Here's where I need your help folks. I have been having some trouble keeping consistant temp and humidity. My infrared lamp is drying out the tank, and my fluctuating room temp is affecting the tank temps. Below I have listed my current setup and my proposed improved setup, I would appreciate any advice or opinions on what I am about to change to solve the inconsistancy issues. With that being said, let it be known that I understand that my enclosure is too large for a young BP, and I will not be changing the size so long as it keeps feeding regularly and showing no signs of stress.

Current Setup:

Exo Terra Terrarium (30x18x18) vent on front, screen top
Aspen bedding
Hot Side - UTH, Hide, temp probe
Cool Side - 75w Infrared bulb, Hide, Water Dish, temp probe, humidity probe

Proposed Improved Setup:

Exo Terra Terrarium (30x18x18) vent on front, screen top
Spyder Robotics Herpstat Pro (controlling all heating devices)
Apsen bedding
Hot Side - UTH, Hide, temp probe (kept at 93*F)
Cool Side - UTH, 75w CHE, Hide, Water, temp probe, humidity probe (83*F)
Portion of top screen covered with foil to retain heat and humidity

*** My idea here is during the day when the room gets very warm the Herpstat Pro will turn the heating devices right down to keep proper temp, and once i'm home and the AC is put on the heaters are cranked up to maintain temp, I could have the CHE on its own probe so it only comes on if the UTH's cant keep up.

Questions:

Does this sound like it will solve my fluctuating temp/humidity?
What portion of the screen top is safe to cover/close off?
When placing the probes for the thermostat, should they be: between the bottom glass and substrate, mid substrate, or just below substrate surface?

Thank you for your time people!