I have two of those Chinese yellow topped incubators in the 56 egg size. One barely works (I only got 1 out of 12 to hatch because it was all over the place) and the other works, but needs constant nursing and beeps annoyingly ALL the TIME for no reason. I use it as my lock down incubator because it is too hard to keep the humidity low for starting in the incubator and not have the thing beeping like crazy. It thinks 44% humidity is too low and I can't change its mind. So it works better at higher humidity.(Better than the Chinese incubator with yellow lid, but I liked that one for its ease of use and how many it could hatch)
So I've decided to gut both of them and give them a new life.
I just bought two Incukit Minis with the compatible turner motor to upgrade them. I plan on using the stryofoam packing that the incubators came in as insulation for them. If this works, I'll have two 56 egg incubators with auto-turners for about $215.
I'm so excited! I'm quickly reaching a place where my current starter incubator (a Brinsea Ovation 28 EX) isn't big enough. I may just start using it as my lock down incubator because I can see through the lid.