As a side note and stating a situation where backups are a good idea I would like to bring up how I wired my incubator. I see a lot of people using 1 T-stat or such on simple home made incubators. While if you are incubating normal ball pythons or such this is a readily acceptable way of doing it. Or if you are just playing around to see what you can do it works pretty good and is an inexpensive way of getting the job done. Now when you get into high end morphs that have the potential to sell for over a grand apiece is the risk to even one egg worth the 3 to 4 hundred dollars saved? I personally bought a professional incubator that was recommended by one of the more notable breeders that we purchased ball pythons from, Michael Cole of Ballroom Pythons South. He uses the dual wafer type T-stats as a primary and back up, but also backs all this up with a Ranco as the ultimate back up that shuts everything down now if 91 degrees is reached inside. I took this one step further and replaced both wafer T-stats with rancos and then added in the third as a full blown emergency shut down. The primary is set to 88 degrees the secondary is at 89 degrees and the master over temp one is set to 91 degrees. So if the 88 degree one fails the 89 degree one will take over as normally closed relay contacts are in use on the ranco if the 89 degree one fails the 91 degree one will start to cycle the whole unit including the fan which the 88 and 89 degree T-stats have no control over. I really like this triple back up idea on an incubator as it may run 3 to 5 days at a time without getting more attention than a glance, where as our snakes have their water changed daily meaning they are inspected daily and heat gunned daily! When you consider the cost of the whole set up at $650.00 and it can hold 9 clutches of eggs compared to the cost of loosing one Bumble Bee morph before it even hatches $650.00 becomes pocket change really quick. This is probably one of the only cases I would really consider using a back up for. At most on my snakes I may install a Hi/Lo temp alarm on them to warn me if the temps get out of range and let me know action is needed!