Many of the games greats have held the "one piece takeaway" in very high regard - Byron Nelson and Jack Nicklaus for example.
Does this, by definition, make them hitters? No startup swivel.
Or does "one piece" really relate to the relationship of the hands and the chest - the shoulder line. Hogan maintained this relationship very well, with about as much startup swivel as you could have!
The triangle.
Percy Boomer 'spoke' of this relationship, the hands and chest, as the key difference between good players, and great players.
Ballard's view was an extension of Boomer's - 'connection' as he calls it.
I would suggest this relationship, of the hands to the chest through impact - is the fundamental root of Rhythm.
Does the right forearm pickup destroy the triangle? Or does this only matter when using accumulator #4, such that 3 barrel folks don't need to worry about it so much?
Whenever my swing gets off, I often come back to the one piece takeaway drill - hold a club about halfway down the shaft, with the grip end touching your belly - feeling the takeaway with the shoulders - hip high to hip high. Many will quickly see they need to work on their flexibility, the main reason many dismiss this move IMO.
Pivot controled hands, some may say. Not if you are monitoring your hands per 5-0!
How does this fit in with Homer's views on the importance of the triangle?
and "sort of drag the club away from the ball." In other words, a totally different look -- but very 'One Piece' -- and yet still a "Lagging Clubhead Takeaway" Feel.