Despite what everyone thinks here, I will be the one to agains swim upstream from the consensus.
If you are having speed AND accuracy issues, you have a timing problem that will not be caused by the pivot foot nor be helped by adjusting the angle of the pivot foot.
Either;
1 The stride foot angle at LFT is not consistent.
2 The stride length is not consistent.
3 The angle of the hips at LFT is not consistent.
4 The position of the ball in the circle at lft is not correct.
I would suspect that number 4 is your culprit.
It feels more natural to turn the pivot foot a little closer to the angle of the hips at lft. If it wasnt the natural thing to do, why would someone want or need a wooden contraption to keep your pivot foot at a different angle?
Take a close look at the other things I mentioned.