[JTillery]

I think I answered my own question. The feel must be in the shoulder because this is obviously the hinge point. Any roll of the forearm would be a swivel?

mac.

A "feel" of roll when using HH would still just be a characteristic of its hinge motion. To remain in rhythm, the clubface, left wrist, left forearm would all have to obviously "swivel" or rotate to the golfers perspective some to get to that "toe down the line at two arms straight" follow through. From there, "finish swivel" is the bridge to get you to the finish.