I also have 189 hellbents centermounted,.... I rip up the whole mountain with them, but in the park they are just wayyyy so slow and sketchy due to the massive rocker, which means you have a very short contact point with the snow and i wouldn't recommend hitting big booters with them due to that. If i could mount them again i would go -1-3 centimetres back from center because some times the suuuper long tail is a bit annoying in pow when you are trying to turn and hit cliffs