[Yoda]

Lynn,

...in 6-C-0, there are 4 types of thrust...you indicate there are only 2.

There are indeed four types of Thrust:

1. Muscle Power driving the Club.

2. Extensor Action supplying Structure (Power Package Mass).

3. Lag Pressure controlling Acceleration.

4. Centrifugal Force driving the Club.

Thrusts #1 and #4 are Accelerating (and mutually exclusive) Thrusts. Thrusts #2 and #3 are Non-Accelerating.

The question I answered required differentiation between the use of the Right Triceps in Thrust #1 (Muscle Power) and #2 (Extensor Action). And that essential difference is in Accelerating (the Left Arm moves) versus Non-Accelerating (the Left Arm is stretched but does not move). Hence the need for my broader classification of the four Thrusts into their respective categories.