Replying to Magic J Mounting

I just got a pair of 190cm Magic Js and some fks 18s (AKA beastly setup, super pumped) and I was wondering if anyone had some advice on where to mount these beasts.

I know they just came out this year and maybe no one has skied them, so anyone have experience with mounting the JJs? I am inclined to go with the factory recommended cause you gotta think Armada thought that shit through when they made the ski, mostly wondering if anyone has mounted JJs there, or farther forward, and what your experience was.

I generally mount my park skis 2cm back from true center, and I'm 5'10'' 180, for reference