[12 piece bucket]

I tried to change the name of the thread to keep the language as per HK. the knees are not considered an accumulator as per TGM so lets leave it at that. if HK wanted them there, he would have described them as such. I mean.. he had 6 editions, right?
Bernt - did I misread your post? the FACT is that they are above the waist. The point is that they deliver power to the levers.. Great post BTW.. and thanks to Bucket.

As per bucket's description, which matches the way someone else described it, the knees can facilitate power to the pivot, and as such, to pp4. Simple.. Easy.. Makes sense.

Would it be fair to say that the knees are a one of many segments that power the pivot? knees are independent of hips, which are independent of the ribcage/shoulders & chest.

ACC4 is described as the MASTER ACC, so I am wondering if it is the master due to the power source (it would be the start of the kinetic chain) or is it because it's the most inner part of the circle of the swing, and therefore has a major impact on the rest of the power package? (lots of meat in there....)

For the sake of discussion . . . here is the power package and "triangle" defined by Mr. Kelley.

DEFINITION

6-0 GENERAL The Power Package concept isolates and defines the functions of the Hands and Arms in propelling the Clubhead into Impact. The Power Package consists of the Arms and the Club – as discussed herein – and includes the four Power Accumulators, the four Pressure Points, their Loading and the Clubhead Lag. There is no Stroke which does not include a Power Package Assembly and the five-step sequence of their operation – Accumulation, Load, Storage, Delivery and Release.

STRUCTURE

6-A-1 THE TRIANGLE ASSEMBLY The Power Package is basically a Triangle and this form puts it under the Law of the Triangle. The Straight Left Arm forms Side One, the Shoulders form the second Side and a line from the Right Shoulder to Hands forms the Third Side – whether the Right Arm is straight or bent. So the shape of the Triangle can be changed only by changing the length of the Third Side. Also, regarding Structure, study 6-B-1-D and 6-B-3-0-1.

So I reckon to use your term . . . it is above the waist . . .

Here's the stuff on #4 . . . I'd say it's master because the release sequence is always 4,1,2,3 regardless of the procedure used . . . so if 4 is loaded then it has to release or the others can't release.

RADIUS POWER

6-B-4-0 THE FORTH POWER ACCUMULATOR The angle formed by the Left Arm and Left Shoulder forms the Forth Power Accumulator. It is not only an independent Power Accumulator, but its Triggering function as the Checkrein of the Right Elbow is also vastly important and it thus can be the Accumulator of the Accumulators – or Master Accumulator. Also see 2-M-4.

As Accumulator #4 it is Pivot (Body) Power supplying the initial acceleration of the Downstroke to throw the Lever Assemblies toward Impact by the Thrust of the Shoulder Turn. See 7-13. Another major contribution to Impact Power is geometric – it is the first link in the Swing Radius power train between the Club and the Feet.

“Left Arm Power” in any form or amount can still be considered #4 Accumulator Action. Otherwise it actually substitutes for the Pivot to introduce the circular motion required to produce Centrifugal Force

6-B-4-A MAXIMUM POWER is obtained by using maximum On Plane Shoulder Turn Thrust against Pressure Point #4 per 7-19, and maximum Swing Radius (6-B-0).

6-B-4-B ZERO ACCUMULATION is either no Shoulder Turn or the use of Accumulator #1 alone for actuating the Primary Lever Assembly.

6-B-4-C MAXIMUM TRIGGER DELAY is achieved by using either the Standard or Delayed Pivot (to increase the Lag of the Downstroke Shoulder Turn) with a Snap Loading Action (per 7-19-3 and 10-22-C) followed by a Snap Release (10-24-E) with a Pitch Basic Stroke (10-3-B). For Hitters the essential difference is that Loading is per 7-19-1.