I can't get it to bubble. It is either nothing or blowing powder every where. Cannot get it to be evenly regulated. I have a fine adjust valve and large aquarium pump. I have used two different types of vacuum cleaner bags and several kinds of brown paper bags. My setup is 2" PVC. I have at the present time given up on the bed and found a better way to dip the powder coat and as of now it works really good for me. With the method I am using now I do not have a mess to clean up after each use. How well did the vibrator work? I happen to have a vibrator motor in my shop and it would not be a big problem to hook up.