I hava new 913D3 driver and I have tried almost every setting on the thing and I cannot hit it with any consistency. It may go left or may go right. Not like it is hooking or slicing but straight left or right. I am about to give up and go back to my old TM that is several years old but never had these kinds of problems with. It has a regular flex shaft that I think is too short and maybe too flexable. Any suggestions ?