[Daryl]

I guess it's save to assume that at impact the left wrist is level and uncocks post impact.

With accumulator #2 ,the uncocking of left wrist. is maximum velocity post impact at the uncocking left wrist?

Would it make more sense to get more distance by having left wrist fully uncocked at impact to increase swing speed?

Does anyone have a yellow book that defines accumulator #2 and best position at impact ie level, fully uncocked, partially uncocked?

You want the Clubhead Accelerating through the Ball.