Roadrunner CNC

[Clive S]

Steve It is well worth the time and effort and you will thanks yourself later by learning the CAD stuff now as you WILL need it later when the machine is finished.

I know you have built the Z axis it seems a shame to put Hivin rails on X and Y and not use them on the Z.

[Neale]

In fact, the total of four Hiwin rails, two each side, for X seems a bit OTT and using a pair of those for Z instead would probably be worthwhile. I doubt that you need more than one rail each side for X and adding more than that complicates the build without adding any real benefit.