I’m calling the machine a "center line tube notcher", which is the principal on which it is to function. Attached is a photo of some of the parts that I have for the notcher. A 6 inch three jaw chuck, looks like I’m going to have to bore out the thru hole so I can insert a 2 inch diameter tube also a 2 x 5“ channel that I had made up and it will be the base of the machine. A ball screw and matching ball nut that should give me precise z-axis positioning , an acme screw for the cross slide, a couple of aluminum hand wheels and a bunch of bronze bushings and some ball bearings. A rotary encoder for a digital position readout and finally my notebook with drawings and notes for the build. Looks like I only need to machine up about 40 parts and I'll be good. LOL