realskiers

Max, I agree that small adjustments in binding location does not affect stance.... but I think it does affect ones ability to apply forces equally tip to tail. The least amount of force required to get max performance I've found is always the best.

I believe it's not a matter of where that mounting point is, at center, plus or minus, it's THE spot that allows the rider to maximize their input from a stacked stance ( I refer to as my "attack position") with the least amount of body movement and with equal fore/aft pressure.

When I apply the pressure as you described, I feel the pressure move along 1) the inside edge of my downhill ski from the  big toe toward the heel moving along that edge as the turn is being shaped and finished 2) along the uphill ski edge from just behind the pinky toe to heel depending on how much diverging turn shape or speed management I'm looking for 3) under the arches of both feet skiing pow with less pressure of the feet described in 1 and 2, 4) all turns finish on the uphill edge of the uphill ski feeling stacked, centered under the arches and ready to commit to the next turn. At less that's my story....and I'm stickin' with it! 

Regarding mounting locations,....I recommend to friends, consider the factory mount point only as a starting point. For me, historically I tend to always start my testing point at +1cen. Depending on how an individual skis and works the ski tip to tail...find that mounting point sweet spot that makes edge pressure and edge changes the easiest and most productive. AND yes, video would allow you to confirm or adjust any modifications you make. I find it easy  to see if someone is too far back or too forward on their skis...but in truth, it's just a good starting point. For many...it might make a huge difference on whether they're getting the best performance initially out of their skis. 
G