Quote Originally Posted by SlitherinSisters View Post
Even if you use that, you still need to buy a nice thermostat, it's going to cost you just as much as making your own.
So far the built-in thermostat seems to be working great... it's been holding steady at 89 for the last 2 days, with no fluctuations that I've noticed. I live in a very temperate climate, so proportional thermostats are much less important here.