Great job Dr. G--this will become a useful tool!
But there are a few problems I see with the current edition.
Assuming that we're illustrating a "contemporary high performance turn" (there's got to be a better name....), I agree with Rusty's observation that the edging should not begin with the outside ski.
My biggest objection, though, is the steering angle indicator. It shows both skis pivoting as one, around an axis in between them. What I would like to see is two skis pivoting independently, each about its own axis. This would result in a slight inside tip lead developing as the skis are steered. (The example I e-mailed you shows this movement, Dr. G).
I also don't see the steering angle increasing progressively throughout the turn, as it appears. Think of the steering wheels of a car going around a circular turn--you turn the wheels a certain amount, then hold them steady through the turn.
Perhaps the illustration is meant to show the direction of the skis changing smoothly in relation to the trail. My thought is to show the direction the skis are turned relative to the SKIER, again similar to a gauge that would show the degree to which the wheels of a car are turned relative to the car--not the road.