By enlarging the super to hold 12 medium frames, it is closer to being a square rather than a rectangle (the lifts are square). I made 4 supers and 4 lifts. By using Pierco frames there should be more available cells per frame than with wooden frames and wax foundation. This should help with the brood chamber space. I plan to use 2 mediums for brood and 2 for honey supers unless that makes them swarm.