My question is do you believe that you need to keep G.O.L.F. Rhythm in putting?
The most important thing to do in Putting is to execute a definite Hinge Action (6-B-3-0). And Hinge Action -- the Clubshaft remaining In Line with the Left Arm while the Left Wrist remains vertical (perpendicular) to one of the Three Basic Planes (Horizontal, Angled or Vertical) -- is Rhythm.