[6bmike]

For me, the Hip turn and Hip action IS the pivot. Train the pivot there.

The pivot components are: Foot Action, Knee Action, Hip Action, Hip Turn, Shoulder Turn. Feet and knees are anchors and braces for the hip motion. The shoulders drag and lag the hips on the up stroke and the hips drag and lag the shoulders on the down stroke. This is Pivot Lag.

The Machine maintains its Pivot Center with the Stationary Head. See Hula Hula.

So does the body weight center in your hips through out the stroke?
If you mean is there equal weight on the feet- yes up to Storage before impact, IMHO. But I like to think of it as lining up the body centers- The Head, Chest and Pelvis at impact (or as close as it can be for me) to maintain the Pivot Center with the Head being the most important.

Train the pivot from the hips, keep the head stationary in training. Practice Hula Hula.