Thanks for the pictures. That was the style I was thinking of. I think it would be easy to build a horizontal hive that has ends to accept the hoses along with the appropriate vent to adjust the flow, but then the hive would have holes that need to be covered when its functioning as a regular hive and it would be prone to air gaps between the top bars/frames. Maybe I can figure out a way to swap the ends of it for solid pieces once the hive is full. Or perhaps I'm better off going with what you did and just move the frames to the horizontal hive once the new residents are settled in.