Original model wobbling with Klipper firmware while fast speed printing and input shaper calibration. So, I remodelled stuff for more rigidity and to get rid of parasitic vibrations. I thickened the main vertical of the holder and added a diagonal. The whole structure is now much more rigid and only slightly heavier. Maybe it could have been made more aesthetically pleasing, but it looks fine for my taste as it is. Thanks for STEP file!