I bought some threaded rod, nuts, washers and some spring nuts to see if I can minimize backlash. The threaded rod is typical 3/8inch. Too bad I can’t find metric sizes locally let alone acme rod. I also went ahead and ordered a Arduino CNC kit that comes with a Uno, CNC shield version 3 with four A4988 modules for eighteen bucks.
Later today if the weather permits me I will try and build up the gantry and maybe the bed.
All what remains is bushings/bearings and slide railing.