Hi all. I'm a new beekeeper and just bought the Brushy Mountain wooden top feeder with floats. According to their video, you put the inner cover on top of the feeder and then the top cover on that. According to the Beekeeping for Dummies book, you do not use inner covers if you are using a top feeder. I'm not sure which way to use it and if it even makes a big difference. Can anyone enlighten me please?