i also spoke with cnc4 you and zapp regarding motors and drivers cnc4you recommended for the y and z axis ball screws there nema 23 3.1 with there cw6060 driver and zapp recommended there SY60STH86-3008B motor and DM856 driver.

from my very basic knowledge it looks like the motors are the same ? can any one give me any advice on the two drivers that have been suggested on which is better?

DM856 Digital microstepping driver

Stepper Motor Driver 6.0A 20~60VAC or 24~80V CNC Microstepping CW6060AC

many thanks