ball screws

[skeezy]

Hello,
First time user. I've got my own thoughts, but am interested in what others think about the "ideal" lead to use on a ball screw mill/router. The smaller lead ball screws would lend themselves to tighter motions from the servo/stepper versus a larger lead. Or, does it really matter. I'm looking to design and build my own for a variety of reasons, and am interested to hear what others think, or what you use personally and how it works.

Thanks,
Jeff