I am assuming you got a deal on the Ballscrew to be that large for what that size of motor must be?
If by 6ft leadscrew you mean acme etc, then it could be worse, when you consider the co-efficient of friction and inertia of a 1" dia screw especially if high lead.
Have you done any sizing for the stepper?
The Uniflex used to be a fairly decent price, but I noticed they have gone up drastically in the last little while.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.