Alright. Got them put back together and ready to start testing out. Wiring placement is all temporary while initial testing is going on. Started with 24 hours of no substrate in either and a water bowl in one. Have been recording Thermostat settings, thermostat readings, hot side, cool side, humidity, room temp and any changes made on a spreadsheet. Best humidity I got was 38% with the bowl and 22% without. Also figured out that the top one is a few degrees warmer on both sides then the bottom one. Thinking its heat rising from lower enclosure. Will have to monitor with temp gun to see if I need more separation so the floor doesn't heat too much. After 24 hours I put about an inch of Reptile Prime in each and it felt very very dry so I put about 2 cups of water in each enclosure and mixed it with the Reptile Prime. Then I put the same size bowl of water in each directly under the RHP. After about 3 hours the humidity in the lower one was 81% and the upper one was 85%. Maybe not a good idea to add water to substrate. Will let it go till tomorrow and see if it settles. I also turned the thermostat for the upper cage to 86 degrees which brought the temp range down to 90 hot side and 80 cool side from 94 and 84 when set at 90. Again I think i'm getting heat from lower cage.
Getting some condensation on the door due to too high humidity. No other spot in cage was wet I felt all around (sides, floor, ceiling, RHP) to make sure I didn't have an air flow issue.
I do have a question about the RHP though. I think I have it right but might as well double check. When using an RHP the top of the substrate should be the hottest part correct? the floor under it should be slightly cooler as its getting heat soaked through from the substrate. Unless of coarse some of it is moved away and the floor is exposed. So if my floor is hotter then the top of the substrate it would probably be caused by the heat rising from the lower cage.