I'm wondering about the advantages and disadvantages to early plane shifts.
The wise one wrote that an ideal pattern would have the least plane shifts, however, plane shifts are accepted. Is there a relationship between the number of shifts and the earlier the shifts occur in the backswing?
One thing that makes Homers statements about Plane Shifts confusing is his acknowledgment of non shaft or non Longitudinal Center of Gravity, non Sweetspot Plane, Planes of Motion. In regard to the Angle of Approach Procedure for instance, he is quoted as saying something to the effect of " remember, its not a shaft plane, its a clubhead plane".
Further complicating things is his acknowledgement that a golfer doesnt need to return to the shaft plane for impact if the ball separates prior to the clubface striking the ground. In his day , most every golfer played a standard lie angle which was located closer to the Elbow Plane than a Turned Shoulder Plane and yet good golfers made excellent contact on a variety of plane angles.
We modern day golfers, in the era of dynamic lie adjustment etc tend to see the shaft plane as the plane of startup and impact. Making a Double Shift seem logical given that the shaft plane is too flat to locate at Top. Homer observed that it was in fact the Longitudinal Center of Gravity , the Sweetspot Plane that Centrifugal Force was acting upon as opposed to the clubshaft. As such he believed you could align the Sweetspot Plane to the Turned Shoulder Plane at Address and despite the Heal up alignment negotiate a shiftless swing with pure contact assuming the ball was gone before the toe dug in. This was his Shiftless Swing. Remember though that despite the fact Homer said that changing planes was hazardous, Plane Angle is less critical than Plane Line Tracing in the hierarchy of Plane Compliance. Changing Planes is hazardous but not as hazardous as bending the Plane Line , in other words. He did appreciate what he termed a golfers "psychological need" to return to the shaft or Elbow Plane although he believed there to be no mechanical advantage to it.
I personally find all it all very confusing, but ............to answer your question Slice, Id say .........I dont know about early shifts vs later but what is of critical importance is that you get on the Plane you select for Impact as early as you possibly can!
Me personally Im a Single Shifter , but have no reason why, it just is.