the only thing I didn't see mentioned.
Stay away from a "leading edge of any piece" only work a "trailing edge". Any "leading edge" can still be worked and become a trailing edge by turning the piece around.
And the only place on the wheel that you should work is the lower front quadrant. IF your looking at the wheel from the side, imagine the wheel divided into four quadrants. The center line......could be considered the horizon......stay below the horizon, in that lower front quadrant.
Many times folks get into trouble by not paying attention and "wandering" up above the horizon line....and as they put more force on the piece.........it tends to get grabbed and the force is increased at the horizon line...that's usually when it gets Ripped out of your hand.
be careful out there. I've heard it said, "it's a poor craftsman, that blames his tools".