My new 6040 improvement plan.

[PaisleyPCdoctor]

I don't think replacing the x axis rails with supported rails will yield much benefit. It looks more work than its worth so I'm going to try a simpler approach.

I'll replace the back panel (3mm aluminium) with 10mm steel plate or possibly 25mm aluminium.

At the top and bottom of my Z axis assembly, I'm going to fit a runner wheel (or 2), adjusted to run tightly along the back plate (rolling along the x axis direction). For the spindle to rock back or forth, it will need to flex the back plate as well as the 2x20mm rails.

I currently cannot see any flexing left and right, just back and forth.

The mod should be cheap, but I will probably need to pay someone to mill some components for me.