I’ve got a Venturi that I use on my lathe, as well a one I built form a kit to do work holding. In truth, I don’t use the one for work holding but rarely. But it works well. The one I use on the lathe works just great. I’ve got no practical experience with proper vacuum pumps in the shop to speak of.
Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".