Wing Rigger set screw adjustment in the mounting block
When you see that the mounting bar from your wing rigger has worn a groove in the mounting blocks you know that the adjustment of the set screw is past due:
Mounting bar from your wing rigger has worn a groove in the mounting blocks
Proper adjustment keeps the mounting bar 1/2 mm (.02″) above the block and the screw should be adjusted so that the mounting bar is about 1/2 to 1 mm away from the vertical face of the mounting block.