Holy cow - that's astave I like!
Have you worked it down? It looks not ready for bending in the pic?
At snakey staves I always make changing cross profiles. Imagine a line from tip to tip, It should lay in the middle of pivot point on handle (otherwise first string alignment correction needed). Now when a snakey curve swings out of this line (looking straight on the front profile), I make the inner curve slightla thicker than the outer curve. This prevents twisting.
Good luck on that exceptional stick!