Is your incubator a GQF? I have a really old, old, old one that is red plywood. It is a hatcher type, but can be used for incubating as well. That old thing works like a charm.
I also have a newer, well it's pretty old, too, but not as old as the red one, GQF. It has the plexiglass door and 3 trays. I bought it last year for $150. but have not used it because it needed a new wafer. I have the wafer to install, but I'm thinking of putting an auto turner in it. Any experience with this? I am wondering if perhaps I should just call the company and see what they recommend. I don't know if I have the mechanical "know how" to get the job done.