@swbca you have no way to precisely measure measure what come off, or you put back on, or consistency over the area. This is quite frankly a chop-shop practice no longer needed. The dozens of iterations tested in development, modernized ski construction, and the proven performance envelopes of modern skis have long since eliminated those things done decades ago, which even then were simply WAG's. With the known capabilities of any modern ski you pick being far above what you or your son are skiing there's no question that your suggested hacking on the ski is not needed. Focus on technique and personal performance, not changing the stick.