Strong single action - V/V/A

[stebboko]

Working on acc#3 and have concerns over my grip. It looks spot on like the pic in 10-2-B, but like it appears in that pic, the back of the left hand looks about 10°-15° stronger than pure vertical.

So with a dual horizontal hinge, the toe points up at the follow-through parallel, but of course left wrist again is leaning that 10°-15° clockwise.

Am I being too exact, have I misunderstood, or might this hinder my progress?