Yeah I think we watched the same video.was it a southern guy, with all kinds of chickens and other fowl making a racket in the background? i just finished making similar incubator following that guys instructions. came out pretty good and seems to hold temperature, i used an AC fan instead of DC fan so as to skip the DC inverter also i used a big foam cooler. unfortunately, it wasn't until finishing the project that i thought to ask, in the comments ,if his design ended in a successful hatch. never got a response, which is troubling. maybe ask around if others think it's a good design. other than that it was a simple build.