Going to build my first incubator soon, and I have an extra Ranco t-stat lying around. I'm trying to decide whether I can use it, or whether I really need to order a proportional thermostat (e.g. Herpstat) - what do you guys think? This will probably be made out of an old mini-fridge or cooler, using Flexwatt, computer fans, and possibly water bottles to maintain temperature.