I too struggle w/ stargglers. I may just get a bee vac to help w/ this problem. sometimes you cant get a good shake to get all the bees, or they are in a tight spot, or lots of flying. I seem to get calls back from about half the people. gas is too high to be driving around more than once.
What is this funnel technique? I know of bucket, but I wasn't able to get a huge swarm on a very thin branch away from main trunk that was 25ft up. So, what is this idea?