Have you looked at the new 2018 SPEED WC FIS GS (R21WC) - 185? They are a really fast ski, hold up well on ice and can go through any ruts on the course. I usually use a ch4 hydrocarbon wax which really helps me glide along on the rails. Best for a 28 meter radius course, but also works on the pipe. I center mounted them with some look race bindings on 16 dins, for maximum control.