I have a David Bradley 6 tray (only have 4) manual turners. The heater works and fan works but I am missing the thermostat wafer. Can anyone tell me what wafer would work in this incubator? It also is missing the water tray but I can make that. I will get pics if I can fugure it out but it looks the same as RWD57 incubator under the thread (1950's David Bradley electric redwood cabinet incubator) started 1/26/10. From those pics it looks like I have everything but the wafer its self. Or will I have to replace the whole thermostat? Thanks for any help I might get.