primary lever length at impact

[Mike O]

once the left wrist is uncocked the lever is at full extension and the clubhead speed will be proportional to the angular speed of the center and the velocity produced by the size of the pulley. Most players with the exception of David toms only uncock to level from the period of swivel hinge and impact and terefore once the maximum speed is created by the lever extension it will remain constant so long as you keep turning

I was able to see that you understood and agreed with my post however I was not sure I was able to exactly comprehend your entire post. If I were to summarize an area I don't think you had quite right then I would say that you were saying - Once the swinger's left wrist uncocks to a level position the clubhead no longer picks up speed.

That would only be true for a zero number three accumulator. The release in reference to the endless belt refers to number two and number three accumulators, once the left wrist uncocks to level then the roll of the number three accumulator adds significant clubhead speed for the swinger, that's why you have it in shots where you want additional power.