Four screw holes of M3 of "Pan Knuckle" I have smashed during the adjustment.I have put a helical insert as measures for the time being.In addition , hexagonal hole so crushed immediately , towards the M3 screws to secure it too , are frequently replaced . This structure can be so simple and light . But the screw is thin and weak . Pan balance is difficult to adjust . Or would not to be able to adjust more easily and tough. So, do you have any ideas for this "Pan Knuckle"?