Back in the studio, it's time for some trimming. This brought up a discussion of
"tap centering" to true up the piece on the wheel. Oops! The autofocus apparently locked
on the sneaker in the background, but this terrible shot is a reminder of two points:
1) Use a moderate speed -- too slow doesn't allow spotting the edge run-out; too fast tends to lose control.
2) Concentrate the eye on the running edge *opposite* the tapping.