Mr. Kelley wrote of his belief that hitting and swinging should not be mixed for fear of the switter. In the golf swing there are 10 non-interchangeble components (stroke basic, variation,hinge,pressure point combination,left wrist action, lag loading, trigger type, power package assembly,loading,and delivery.
I feel that using #1 (the right arm) will produce an angled hinge and this is arm only putting. I feel that using the shoulders (pivot power, #4) should not be mixed with the use of #1.
Use either, but Mr. Kelley, I feel, said don't use both.