I'm a bit late getting this in here, as it's been over a month now.

With the summer weather here, I was looking to get my chest freezer set up to ferment, but hadn't had a chance to look around much for a LV thermostat or controller. After looking online at several brew suppliers (doug was closed) and stopping in at some shops on the Northside while working up there, I found a Ranco ETC 111000 on Ebay for around forty bucks. the only difference between it and the ones in the stores is that you have to pitch in your own $3.00 home depot extension cord (you'll need both ends).

Anyhow, with this setup, you can set the temp on the freezer, and give it whatever span you want ( I set it at 58 with a 5 degree span, and it only cycles the freezer once or twice a day in my 90 degree shop). Works great, and it's cheaper than most dial type controllers. Just make sure you get one that's set up for line voltage. I'll put some pictures up soon.