I have been a BK for one year. My buddy (who just started and thinks he already knows it all) is trying to convince me that the spacers that bring a 10-frame down to a 9-frame (or 8-frame down to a 7-frame) will produce much more honey (He thinks around 20% more). I don't see how this is possible. I seems to me that the only thing you would really be gaining is one less bee space in between frames by having one less frame.
Has anyone ever tried running your supers this way? Any pros or cons that you are aware of?