I had a modified Dremel CNC and it had some issues so I ended up making a new one from scratch.
It's not perfect but it's pretty rigid even if 3D printed.
There is a Fusion 360 file because I used what I already had and you should be able too.
The STLs have the correct orientation and you shoudn't need supports. The unssuported section on XR is meant to be bridged.
Z1 benefits from more top and bottom layers.
You should use at least 1.6mm wall and 25% gyroid infill.
I used a hotter temp and 0.6mm nozzle at 3 perimeters (1.8mm)
Instructables: https://www.instructables.com/Spoica-Industries-CNC-V1/
The author hasn't provided the model origin yet.