I agree with all that the shop vac does indeed do the job. The way i work my vac I purchased a electric junction box and a dimmer switch wire and female recepticale and a male plug. Plug vac into reeptical and you control speed of motor on vac wich in turn controls the suction. Put two drawn frames or foundation inside vac. When finished pulling bees open vac and bees can then be moved to a hive. Have done this with swarms for years.Very few casualties.