[KevCarter]

I'm wondering about some pros and cons to the downswing being on the TSP.. including impact. Are there any specific components or accumulator sequences that would be necessary?

not sure where this can go but a little discussion on it might trigger a few questions. thanks

To start, the simplest procedure would be the standard shoulder turn (10-13-A) which is really a combination of B-Flat backstroke and D-On Plane downstroke.

Not mandatory, but recommended.

7-13 SHOULDER TURN
...
When the Shoulder moves on the same Downstroke Plane as the Hands it provides the greatest support and its best guidance to the Stroke.
...

10-13-A STANDARD
This is dual application of the Flat (-B below) Backstroke and On Plane (-D below) Down-stroke Shoulder Turn.

10-13-B FLAT
This is a relatively flat Backstroke Shoulder Turn which places the Shoulder “On Plane” for any Plane Angle with a flatter angle than the Rotated Shoulder Angle. A Flat Down-stroke Shoulder Turn can serve only to impact a circular motion to the Stroke, but almost irresistibly “Off Plane.”

10-13-D ON PLANE
After a 13-B or 13-C Backstroke Shoulder Turn, the Right Shoulder moves toward Impact precisely on the preselected Down-stroke Clubshaft Plane, establishing and supporting the Power Package Delivery alignments. When the Shoulder can’t quite reach the Plane, it is better to use a steeper Plane.

Kevin