thats probably cause you had 160's....but when i move it all the way back, the ski makes much wider arcs...and skis stiffer. Slide it forward, allows the ski to flex more, and hence make quicker turns. But when i skied in 60 degree weather over christmas, i was getting stuck in the mashed potatoes, and i realiezed doH! i have it set forward, slid it back, and skied it like it was powder
to me, maybe its just a mental thing, but it does work