I have tried the clubs captured hollowing tool 1 time. I did not have a lot of hollowing experience at the time and it seemed to take quite a while. The next time I hollowed (something large) was at the Trent Bosch hands on. His tools seemed to work much better for me, I just felt I had more control. I do however like the look of the Monster style articulated hollower. I think if I were going to purchase or build a captured type hollower it would be a Monster.