1) Yes. The Pivot slows down during the Downstroke, but you should also preserve the Downstroke Release Sequence (6-M-1) and the consequent Lag and Drag in the Pivot Train (6-C-0).
2) The Shoulder Turn Throw (10-20-C) should always be used with the Wrist Throw (10-20-E). Otherwise you will be contending with Clubhead Throwaway, or a Full Sweep Release if skilfully performed with Educated Hands (10-20-A). So, start with the Shoulder Turn Throw, then finish it off with a Wrist Throw and Delivery Path Throw (10-20-D) combo to get nice Automatic Snap Release (10-24-E).
3) Even though your Pivot does and should slow down to blast that essentially inert Left Arm off, it shouldn't be a deliberate 'applying the breaks' type movement. That would be like Steering the Pivot.
4) All the Patterns Yoda and I described have the Right Shoulder 'On Plane' on the Downstroke. This is regardless of whether you're using a Shoulder Turn Throw or Shoulder Turn Thrust.
Tong, your points 1,2 and 3 were very clear. I lost you on point 4. Would you mind differentiating between the Shoulder Turn Throw and Shoulder turn Thrust? ST Throw = 10-20-C, ST Thrust = 10-?-? ??
10-20-C calls for a short, sharp acceleration (thrust?) of the right shoulder against the #4PP.
How are you defining a Shoulder Turn Thrust as a distinct component from the Shoulder Turn Throw. Is it a longer, more sustained thrust than the short, sharp acceleration of 10-20-C? Is this more compatible with the driving right arm of the hitters motion?
Threaded Mode
