If you have a 159 ET, that means it is the Classic round tip/tail model. That deck has a running length of 120 cm. The 2012 ET 156 Wide has blunted tip/tail and a running length of 118 cm. That is ample for you as a park board. 92 kg is 203 lbs, and this is a great fit as a park board. No worries cruising piste on it as well. Too icy or too deep and there is no substitute for surface area and effective edge, but there is a lot of crossover potential there.