finnfur
Songster
I've used cooler-bators (I didn't make), and box-u-bators (I made myself). The boxes worked best, oddly enough. I'd be willing to try building a freezer incubator with the right parts. This is very encouraging!
Can't take credit for idea as I used information from BYC member @wekiva bird .
Used kit from http://incubatorwarehouse.com/incukit-xl.html
a lot of accessory parts came from Wally world.
It was a fun project the biggest problem for me was finding a defunct freezer out in the country.
I actually bought a working one on craigs list for $50 - when not hatching I could use it to freeze culls