Tiltable carriage for Kossel Mini

In my quest for the perfect printer, here's a new design. It's a tiltable wheel carriage for my Kossel Mini allowing to level the arms and ensure the effector is flat.
Enhanced impression quality but didn't fix my problem again, which came from my auto bed leveling procedure.

Anyway, this design exists and works fine with manual calibration. Enjoy !

Print with supports disabled and use a 3mm drill to make holes.