[Yoda]

Any recommendation on the edition? I've read somewhere pa3-based pattern (rotational power) was almost eliminated in the later editions (7th Ed I think)? To make way or focus on pa2-based pattern--velocity power? Is this true?

Respectfully.

The first three editions of The Golfing Machine offered "Sample" Stroke Patterns for Golf Strokes from Drive to Putt. The Power Accumulator combinations varied accordingly.

Beginning with the 4th edition, these were eliminated and replaced with the two "Basic" Stroke Patterns (Hitting / 12-1-0 and Swinging / 12-2-0). Homer then advised that these two Basic Patterns be customized by the player as deemed necessary for the Stroke at hand.