If you buy into spine alignment or flo'ing, or Puring and believe it is important, what about the effect of rotating the shaft to make lie/loft adjustments? If the spine is aligned for the A1 position, and you change to the A2 position, you have just gone 90 degrees out of the optimal plane. Some would contend that this causes a club head "Wobble" that varies with the force of the shot.