Well, tomorrow is moving day! I've done a little work since my last update. I added a shelf and a couple of full width dowels for climbing. I figure if Snakey likes it, he'll use it. If not, he won't, and I can always remove it.
I was also concerned about humidity control. It gets very dry this time of year here, and in his aquarium, I just cover most of the screen with a wet towel and it keeps the humidity up. When he's shedding I sometimes run the humidifier and let the mist drop into the tank to really up the moisture. Since this is all wood, and has a top on it, I was trying to figure a way to add moisture. I didn't really want to mist the cage since it's wood, and misting only lasts a short while. I put vents high up in the front, and one low in the back figuring I would get cross ventilation. I did a bit of experimenting and found that, with the heat running the warm air rises and exits the front vents, and this gives a good draw through the rear vent. That got me thinking, so I built duct out of 1/8" plexi that fits tight to the rear vent and will run along the back and out the side. The duct has it's opening on the bottom and it will allow moisture to be drawn in through the rear vent. I'll experiment to find out how to best do this. I can spray the inside of the duct, or maybe place a pan of water under it or put a wet towel in it. I do know that if I put my cool mist humidifier under it I'll be able to easily keep the humidity anywhere from 50-90 or even 100% just by adjusting the output of the humidifier.
Here's a pic of the duct, and I'll post pics tomorrow of the finished product after I get the viv decorated and introduce Snakey to it.