linear servos

Those "goodies for sale" might be too good to sell!
Given that I want 120" travel at high speeds and good accuracy
A: the ballscrews would be LARGE and spendy
B: rack and pinion or belt doesn't give the accuracy
These motors are by design .001 over rntire travel!
Problem. the are driven by analog I need help contrlling them
with step-n- dir [cncpro]
Could be really fast and good

Carl