I am trying Polystyrene hive for this first time this year. Placed packages last weekend here in New York and the bees seem to be taking to them fine. I have a concern about the bottom board however. They have built in Varroa screens, which I am in favor of, and the base has numerous scallops built in. This allows for a lot of air circulation through the bottom, and hence through the Varroa screen. I am worried that there may be to much cold air on the new package during our cold spring nights. Right now we are reaching 35 deg F. at night, and up to 70 deg F. during the day. Does anyone else think that this provides too much draft? Has anyone blocked these scallops for spring/winter seasons? I am considering building a wooden base that would have removable slats that would close these holes during cold weather and provide a place to use a collection tray under the Varroa screen. Any suggestions? Paul McLaren Poestenkill, NY