I just saw the pic. I'm no expert, but some basic tips I've gained from this site are to...

1. Have a hot side and a cool side. For example, put your Heat Lamp on one end w/ an UTH, leaving the other side cooler. This is critical for them to self-regulate their body temp. Hotside 90-92/ Coolside 80-82/ Humidity50-60% (You may already have an UTH, but I can't tell)

2. Have 2 identical hides one on each end (hotside/cool side)

3. Don't use analog thermometers due to inaccuracy. (try to buy a digital Acu-Rite's Thermometer/Hydromemeter seems to be praised on this site for it's accuracy and price.

Since you already have a Thermostat it will be easy and cheap to alter your setup.
Hide= maybe $10
Digital Thermometer/Hdrometer= $15
Time= 10 minutes
Happier BP= Priceless