Rob, in golf there is always more than 1 way to achieve the same result. Different drills work for different people and situations.
The take-home point is to keep your wrists lagged for as long as possible and at impact make sure you maintain the strength in the left wrist by keeping it firm and as straight as possible.
Now this is rather complicated to explain in writting but the point will be made towards the end. Put your hands in front of you in mock grip. Now hinge your wrists up & down - that's the correct hinging & unhinging. The bad news is that in golf the hands & wrists move both horizontally and vertically ... so, your wrists still need to hinge in the same fashion but instead of hinging on a plain perpendicular to your target line, they actually hinge on an ellipse-shape arc that runs pretty close to parallel to the target line.
That's why golfers think the wrists hinge sideways because the hands move sidewide accross the body in the swing. But they MUST still hinge in the same vertical fasion while travelling from right to left in the swing arc approaching impact.
Almost all of the "work" in the shaft happens on the downswing. On the way down, the club head is being pulled into impact by the shaft and this creates a horizontal (the hands moving right to left into impact) and vertical (the hands moving down to the ball) force. It's difficult to say how to feel the force because the downswing happens in all of 0.2 seconds and that's not even enough time to blink, let alone feel anything.
But, you should be able to feel the shaft doing some work and whip into impact with its speed at its greatest through the area of impact.
I hope this helps. You know where I am if you need more help.