For light loads, such as a laser or pen, I’m very happy with this printed, BB-bearing, Z-axis…
I’ve used it on a couple of laser engravers… the most recent being a rolling-gantry miniFoamRipper…
I’ve built a couple of CoreXY laser machines in the past… and really like what you’ve presented here. I think it would be great fun to build another one.
– David