Well in the mist of all the crazy weather here today I get a swarm call from a builder at a new home site. When I get there I find a crossover (my new term) meaning they are moving into a wall cavity (this is the closest I want to venture into JP's world) So the guy who built the wall very bravely removed all the screws and handed the hammer to me (I had a very large audience) I then removed a 4X8 sheet of wafer board and wow....huge swarm. I wasn't quite sure what to do so I trimmed a mite drop board to just fit between the studs and set my box minus two frames at the base of the wall. Slowly I scrapped the bees into the box, took 4 or 5 times before enough fanning was going to to get them to stay. Hour later I buttoned them up and took them home, might be the largest swarm to date. As a bonus the tornado's somehow missed us...my prayers for those they didn't.