Replying to Mounting Armada El Reys

Alright, I'm super stoked because I lucked out and got the last pair of 178cm El Rey's in Canada.  Now I have to figure out where to mount them.  Any recommendations?  I got the Rossi Px12 Jibs for the binding. 

I'm 5'10
160lbs
Aggressive All-mountain skier. 
Novice at park
Using this ski as my all-mountain pair.  For trees, groomers, off-piste, etc. 
I'd also like to use these in the park from time to time.

Should I just get them drilled at the recommended mounting point?  Or would it be alright to go 1 or 2cm back from core center?   I definitely want to be able to ski powder and be able to carve on these.

Sorry for all the questions.  I haven't bought a new ski in a long time so I'm not sure what to do.   Any help would be great!