Designing cnc router approx 32 inch y axis and 72 inch x axis. So I know most will say go rack and pinion cause of ballscrew whip I understand this so guess my real question in a rack and pinion system the pinion gear is not really meant to be just cramped against the rack by spring pressure . Racks and pinion gears are actually designed to have a clearance maintained between them how are you all accomplishing this or are you not. Yes you will have some backlash but if gap is correct should be minimal. Ideal the thing is with ballscrew less backlash and easy replacement if does wear. I would like to see rapid speed maybe 500ipm and cutting speeds of 350ipm. Appreciate any thought