So, I'm going to use slatted racks in my hives and I plan on building them myself. I have seen two different designs and am not sure which one to go with. I'm looking for input on which one I should go with, and if there is a big deal with the difference. One design has slats going the entire length of the rack, where the other has a 3 inch solid board at the front. The pictures show one deeper than the other, I'll be making them 2.5 inches deep. The only thing I'm not sure about is the length of the slats. I just don't know if there is a difference in the performance of the rack. Thanks!