Wow that is a lot of info thank you very helpful. I was thinking same balls reward for z but never thort of pitch so that was very helpful. And open carriage linner rail tracks for x y. The motors thinking of closed loop motors 2x 34 for y and 1x24 for x and a 24 for z. A stand alone singalong border computer. But now the software????? Any suggestions I am playing around with fusion 360 but mach 3/4 seems to crop up a lot on videos again many thanks for your advice so far.