I'm a second year bee keeper with 5 hives. I currently have the 2 deep 10 frame setup (non-4.9 mixture of all kinds of frames/foundation/foundationless)...in 4 hives. My 5'th is a recent cutout only one deep. I would like to know if there is a real advantage to medium hive bodies other than weight? I can see somewhat of an advantage when going foundationless and running mediums (MB)...but wouldn't that make all shallows even more advantageous? I think I'm going to start the regression next year with mannlake black plastic...and a mixture of wooden foundationless in a attempt to keep everything straight. I just wanted to make sure I'm not missing out on something I don't fully understand. ~Justin