Since the old heaters stopped working (water got into the plug ports in back before I figured out I needed to seal those with silicone) I haven't been able to use Hambase Alpha in the winter as the aquarium's out in the garage and I don't feel like spending the $$$ to keep a hundred gallons of water warm all the time.
So I've ripped out as much of the old heaters and wiring as I could (cyanoacrylate glue doesn't fuck around) and this time did not make the mistake of trying to use the chemical spray that's supposed to un-cure the glue as that doesn't work for shit and basically ruined one of the old habitats I tried it on, such that it had to be tossed out. Instead I worked at it with a chisel and hammer until as much was removed as possible. Soon I'll drill a new hole for the (110v!) power cord for the new 5 watt heater pad. There will also be a layer of cardboard under it to insulate it from the habitat floor. I figure this will keep me busy while I wait for the lead weights to arrive.
I couldn't find one the exact size of the habitat floor by the way. Besides which, I don't really think heating the entire floor is a good idea. If I heat up the spot where they do their business, it'll cause the urine to evaporate into the air and all kinds of related nastiness. Also don't wanna heat the food as it accelerates decomposition. So just the center of the habitat should be fine. It's plenty of surface area for 1-3 hams and it gets very comfortably warm. I've tested it out already in the land cage and it's quite the popular place to sleep. :3
At right: Bonus pic of a hambro testing out the heater pad under his travel carrier. :'3 :'3