Bought the Holdfast system with the 3" and 6" cups for some twice turned bowls that are larger than my cole jaws can hold. Thought they would be dry enough by now but they still need some more time to dry so I tried the system out on some 8" walnut salad bowls I'm doing.Put the bowls in the tailstock with a reverse chuck adapter and slid it over right onto the cups and presto, perfect alignment and vacuum pops the taped shaft right out of the tailstock. Superior holding power and rock solid. Still used the tailstock to get the bottom done except for the leftover little nub and finished that off without the tailstock.This was exactly what I was looking for and that's exactly what I was expecting to accomplish. Love it when a product meets your expectations. Big thumbs up on the first couple of bowls I used it for.