Replying to Help on placement of Bindings ++++Karma

Okay so, I just got some Troublemakers (168) + Px 12 Jib Troublemaker bindings.  I am 5' 6" 120.  I ski everything on the mountain, hike out as much as possible.  I just started skiing park.  I can 540, 270 on/off, do some handrails but nothing crazy.  So My question is if I am significantly better at skiing "big mountain," and will be spending more time outside of the park, than in the park but am getting into park skiing where should I place my bindings.  I was thinking -2cm (-3.5cm is regular right?)

How much differently will these measurements ski? 
Thoughts? 

Thanks in advance.