go like 1.5 back. 2 back is money on the 183s, but its gonna be pretty setback on the 167. it really is the money spot for those skis. theyll rip everything
I had last years 167 STL's and I mounted them at center... Best park ski ever! till they broke of course. But I think center would be great for you, I used them in the park and all mountain here and there and they were great!