For edge cracks not to happen u have to make ur edge not be on the same level as the base, so when u slide a rail u won't touch the edge. But the presters are a stiff full camber park ski, the NEW punx are going to have a rocker/camber/rocker profile and are going to be a little softer than the presters, but they aren't as soft as the TC'S for example. Hope I helped!