Ah right, I meant where on the ski you give the impulse, not how much.
Franko is also skeptical of the idea that skier's get the tips to do more of the turning that the rest of the ski when carving.
He points out that if a force is applied to one end of a rod and not the other end the rod would rotate about the mid point - which we don't see in carving turns. Says there's no technical evidence of it.
Made this comment on FB re the feeling of pressuring the tip.