I've only had my K1 max couple of weeks but have printed a dozen or so small items when I. noticed that the plate travel on the Z axis has small jerky movements as it begins calibration for print. is this normal? should I apply lube to the Z lead screw and or guides? Not sure where lube is required on this machine. where can i find a manual that shows lube points and maintenence schedule? Or what type of lube is used. I have about every kind from lily white oil to 150/190 lithium grease and drylubes including talc, dry graphite, powdered teflon, TIA