Removal of the x-axis was a little tricky, because I didn't want to destroy the old motor mounts. But otherwise I followed the instructions in the description. Very nice design. Thanks!
Printed exactly as in the instructions. I used PRUSA transparent green PETG at 245C. One of the motor mount fronts broke when I tried to remove it from the bed, so this part may be a bit weak, so be careful. Everything else looks really sturdy, though.