went to a shop the other day and saw the system, they are mad heavy but also one of the best ideas ive seen to date, if they could make the system lighter, then i think i would buy it any day of the week, its really cool, there is this lever you pull towards the front of the plate to switch between park ( foreward mounting) and pow ( bacward mounting) i dont really know exactly how much the change alternates, but i would recommend if ur gunna get the ski, get it without the system.... that is about the extent of how i could help you, with im sorry was not much. Ive actually heard nothing but good reviews about the ski itself you can find a ton o reviews in the ski review section.