M300 Dual - Y axis ball bearings separate from extruder

I’m quite disappointed, my printer is around 350h of printing time and I had this issue. Ball bearings from Y axis on extruder take teheir own course and left the extruder :confused: I started to verify fixation of other ball bearings and I doscovered that none of them was tighten. The screws were loose :confused: flagship model with this quality… printer is not working 3 days of printing project is waiting. Waste of the time.