Three jaw vs four jaw lathe chuck ?

Thanks for the offer darkzero The Buck with adapter was about 700 shipped .
 
No problem, I'll go ahead & delete my post.
 
Keep in mind that if you mark your part in one spot, and mark the corresponding jaw of your scroll chuck, then when you need to re-chuck it you make sure to load it the same way again, unless your chuck is in bad shape it should be reasonably repeatable.

Sure, in theory a 4-jaw scroll chuck will not hold non-round round stock perfectly, but in theory the deformation (always occurs to some extent when chucking) will bring it back into round. ;)
 
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