I think the hex jars are smaller than my test jars but I still think they are much more attractive. They are about 50% more to purchase (from memory). As you said, efficient use of space could be achieved with the hexagonal shape. If I filled the board to capacity, I could possibly fit about 30 jars in. G3farm?s idea of swapping locations of jars is an interesting one. I might try that just for fun. It would be nice to know the answer. The other thought was to place a dribble of honey in the jars where there is minimal activity. Initially, I may leave everything alone for a few days to see if the bees start anything without intervention. The best outcome in my opinion would be for the bees to draw out the smear of wax on the bottoms of four of the jars as this would be the easiest of the techniques and would supply a pure, entirely natural comb. Time will tell.