This is my version of the RoboVac (as shown @ Buskillvac.com). I've helped a friend on several bee retrievals using a box and a separate 5-gallon bucket vacuum (sold @ Home Depot). Since I had a small 20 year old shop vac, I stripped it down to the motor with its handles and mounted it in a box the approximate size and shape of the top portion of a Robo Vac (now its one component for ease of transportaion and use). You can see the adjustable vent to control suction next to the vacuum motor. Simple, but effective.