Well, I hate to be a naysayer, but I think this vac stinks. I should be able to modify it, but c'mon I shouldn't have to.
It sucks too hard, even with the vent wide open. I had many bees, if not most splattered on the inside of the cage. I can fix it, but...
The tube that comes into the cage is too far in. It stops within an inch or two of the back wall. This, I think, also contributed to the splattering. Again, I can fix it.
The cage barely slides down into the bucket, which allows minimal ventilation.
The entrance into the cage is also near the bottom of the cage. Not something I can change, without starting over completely. Or, maybe it is too near the top. Not sure which, but it seems too close to the bottom because bees were piled up. If it worked correctly, though, bees would not be PILED.
The trap door, pushed through, was also a problem. It crushed a lot of bees when it went shut. Seems it should have been hinged on top instead of the bottom. It was actually a minor thing compared with the rest.
Just frustrated that I paid for something that I have to put more time and money into. If it is advertised as such it should perform that way without modification.
Other than that......it sucks