Ok, after many hours of searching this forum and many dollars spent, I have found (like many others) mulitple problems with my tank setup. My setup currently is a 20L tank with small UTH's on both sides on seperate reostats, CHE in the middle. The lid is mostly covered to retain humidity, but it does not retain enough of it. The CHE sucks it dry. Although my temps are good, my humidity hovers around 40%. Here is my proposed soluition. I have spent a ton of cash trying to get this right so my hope is this will be my final step.

I want to get 2 large UTH's so that about 90% of my tank is covered. I will put them on seperate reostats to achieve ~82 on one side and ~92 on the other. The ~10% not covered by UTH will be in the middle for transition. I know this will keep my humidity good and my house is at a constant temp so the reostats should suffice. My last remaing question...Is it ok to heat my snake with ONLY belly heat? I ask this because I know the ambient temps WILL NOT be very high. However, we are heating a BP that rarely (if ever) leaves the ground or his hides. I am sure the ambient temp in the hide will be good as well. Is anybody using this type of setup? Any other ideas or concerns? Any help would be most appreciated.