I am looking into building my first CNC router. This will be a purpose built machine in a mild production environment. I want to hang two opposing Bosch 1617EVS's on the Z-axis so they can make a vertical slot on both sides of an LVL (one side at a time). I was hoping someone would know if a NEMA 34 stepper would have enough power to move the Z-axis with 16.6 lbs of routers (plus brackets), or if I should go with a servo. Any additional help or insight would also be appreciated.