Well, if you are at what I was talking about, but slow down on the last step, then your foot might get there when the
ball does, which is not what you want. If you have a free armswing, start at the point of release. If the timing there is good, I wouldn't mess with it. If it's not, figure out which way it needs to go, make an adjustment to either footwork or pushaway, and repeat. To check, get some
video from the side, near the foul line, so you can see when everything arrives there.