Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4300714.

I have mounted the orginal bearings upside down and added more in the old place of them to make the carriage more rigid. But this also meant that the wobble fixes from others wouldn't work anymore for me. So I designed my own anti wobble fix, that grips onto the outside of the bearing instead of the smooth rod and is a bit longer to get the arms on the right height.

I am using 3 M3 15mm screws for each side.

The additional bearings were added with this: https://www.thingiverse.com/thing:3997593