ball screw preferences

Hello

I have started building a small cnc mill .Iam at the point that
i must select stepper motors and ball screws,

The table is a Enco milling table

I need 3 ball screws and nuts about 2o " long.

I am seeking advice about the screws and motors, remembering this
my first CNC build. It will be 4 axis ,one for a dividing head.

Does anyone have experience with rolled screws.


Help:o)

Billy