If the MPCNC is to be used for CNC milling I don’t think it makes much sense. At the feed rates that work with the stiffness of the MPCNC I don’t think that the mass of the X and Y steppers is an issue. If used as a 3D printer or a laser engraver then it could make a difference. Although looking at the video of Allted’s multi extruder printer I’m not so sure.
Reply To: Moving motors to static location