Accelerating The Inert Left Arm And Club
 

Yes...the Primary Lever Assembly (Left Arm and Club) is accelerated by the Momentum Transfer of the turning Body (through the #4 Pressure Point -- where the Left Arm contacts the side of the chest). Specifically, it is accelerated by the unwinding of the coiled left side via the Right Shoulder Turn thrust.

'rag limp' arms can help you get that pivot power and throw out. You want 'just enough' structure - extensor action - such that the wedges stay 'set' (power package). Beyond that and you are introducing tension that slows down and/or kills momentum transfer. A true swinger can actually use quite a lot of 'limp arms', because CF will take care of straightening them for impact if the rhythm and aiming point are correct.

Structure, not tension. Crack the whip from the ground up.

The Thoughts of swinger
 

Pivot power may be the main source of energy for swinger. Say, the pivot is the engine, but what started it?
The ultimate senor in our body is our fingers and hands. Where driving a golf ball further, is related to the clubhead speed and sound mechanics. One of the option in swinging a golf club is, less move with the body (Better balance) and Maximum motion with the club head.
I am a Hands controlled pivot believer (obviously we have to train the pivot motion too), where swinging our fingers and wrist (on a fix centre) would be the best way in swinging the golf club with maximum speed, I always think of the pivot is in the hands rather then the pivot itself.
Could we call that momentum transfer too? Using the fingers and hands plus the weight of the club head to trigger the pivot to function, then the larger muscle group transfer back the energy back to our hands, shaft and the clubhead.
Again in golf, what we think we are doing might not be what we are doing. Could that be two half circle (Eillipse) forming one Eillipse.
Left wrist as the pivot for the upswing to generate momentum to move our pivot clockwise. And using the left hand to relay from the top and think about the SLA as the pivot and trigger the body pivot to move, then transfer the momentum back to the PLA..
If we are intend to start our main muscle to start the swing (Pivot controlled hands) It will create a lot of unnecessary body motion and easily losing balance. Again is dependent on the option that you are chossing.

K so.....fold and lift? or just fold?

???

Put your focus on what the club does, what your hands do. If you are 'thinking' about lift OR fold, you have lost your focus, which for a swinger must be the entire MOTION, not a particular part of it.

The entire club must swing. Do not get in the way of that swing.

Smooth, heavy motion, the swinging force in your hands.

Good post EdZ...ur prolly right too man.