Overnight made my decision Betty's getting upgraded but will take me several months at least, what scares me the most is the rack and pinion for the 3m axis someone on here hasa plasma cutter setup this way they are going to learn to hate me lol.

15mm just seems too crap found 3m 25mm Hiwin's for $600+import tax I think this make sense and sell my 1.2m Hiwin's with ballscrews and motors.

Nema 34 the R&P, use a 4nm nema 23 for the gantry and use my existing gantry. Will need to remake every plate but now I have the machine working that's no biggie.

So to that end I spent this months budget on
https://www.ebay.co.uk/itm/112394613868

Now I need to work out how to fit lol, I have a vague plan of fitting the BK15/BF15 upside down with custom adapters I'll make so it lines up with the existing motor mount for the gantry. I also might need to remake a Z axis plate we shall see.