I have that one - from Lee Valley.
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I just got one of these: http://www.pennstateind.com/store/CSCPENCHK.html
I really like it. No marking and dead center every time. Even on "not so square stock". It's a quick set up too.
I think I may have found a decent self-centering vise.
Does anyone have experience with this vise?
Steve
I don't know how you feel about drilling on your lathe but I just got one of these: http://www.pennstateind.com/store/CSCPENCHK.html
I really like it. No marking and dead center every time. Even on "not so square stock". It's a quick set up too. I'm not compensated by PSI in any way, I just really like this chuck.