seems it would be hard to execute horizontal hinging and NOT have finish swivel....its almost a continuation of the horizontal hinging, to me anyway.
Still, in some other post Yoda talked about turn and roll, turn and roll, turn and roll, to ingrain the feel of left arm rotating on the BS and rotating on the DS. Seems to me that turn and roll is at least minimized to almost nothing, (or simply not needed at all), with a strong grip.
You can produce a horizontal hinge and then simply allow the left wrist to bend instead of swiveling to the finish.
the problem is that you won't always do that because centrifugal force is trying to swivel it back on the plane and this is why most "strong grip" players play the fade because it's more predictable.
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I'm not a TGM or PGA certified Pro, but I did stay at a Holiday Inn Express last night