i had two buddies skiing 4frnt's including myself last year. one of them had the STL's and i think he got two new pairs from 4frnt, because of the edges cracking, before he threw them away and bought a pair for walls. but i haven't heard anything about the base beeing rippet off, just the edges. me and my other buddies both skied TNK's. his skis (the 07-08 modell) died pretty early. again because of the edges being ripped out, but the base stayed fine this time too. I've skied my 06-07 TNK's for one and a half season and they're still ripping hard! even though there are some cracks in the edges i hope they'll stand this winter to. cause frankly i like them so much and they're awesome parkskis.