I have a GQF 1202 incubator and the back up wafer has died or gotten killed in transport. I can not get it to regulate at all by itself., I THINK I need to order the entire wafer and switch as the one that is in it is original and looks older than dirt. but I am not sure if I am ordering the right part, so asking here, the part number on GQF website is #3122, is that the one I need for a cabinet? I want to make sure before I order it. Second part, I have LF orpingtons, which plastic egg racks do I order? the large egg trays or the universal egg trays? my orps lay from medium to large eggs. I have never had any other breed so nothing to compare size to. any help?