This is my setup for two hives , partially inspired by OJ Blount video . The bottom : Under each side of the hive I have a 2x4 . Window screen stapled across front and back (removeable) . All this is on top of a deck so the bottom is sealed . This gives me a 3.5 inch cavity under the hive which is sealed from SHB , but allows ventilation through the screened bottom board . In this cavity I keep an oil tray , or in winter I can use the cardboard insert with the SBB . The top : I built a box with a solid bottom (quarter inch gap ). In the bottom of this box I cut three round holes for mason jar lids . This completely seals the top , no inner cover . These wholes can be sealed with lids , ventilation using mason rings with window screen in them , or quart jar feeders , or any combination . I have cut slots in the top of this box for ventilation , and a telescoping lid above it . This setup , allows me ventilation and feeding , while completely sealing the hive from SHB , except the front entrance . I don't present this as the best answer , just to perhaps spark ideas and inventiveness . Members of this forum have been very helpful to me , and I wanted to give back a little . I am new to beekeeping , so if my ideas are flawed , please elaborate gently .