I got off the lift today and stepped in my rear binding and noticed it was loose. After fiddling with it a few minutes with no success I decided to take it apart to investigate further. After a 1/4 turn loosening the king pin bolt the binding came apart! The spherical king pin nut was sheared off! Thankfully I caught this before I took another run as I am sure it would have let loose on my way down the hill. I strongly suggest you check these nuts for cracks. Also, anyone have any idea where to get these spherical nuts?