Hey all this is my first post so I am really looking at a PM Knee mill. I really want a knee mill well because I want one lol . But I would also like to be able to convert it to a manual/CNC machine so my question is, are the lead screws based on a Bridgeport? IE if I took out the lead screws from the machine and ordered Bridgeport lead screw would it be a direct replacement? The reason I ask is I want to be able to replace the acme screws with ball screws for a cnc conversion.