The karmas FR or traditional midsole point is REALLY Far back, for a twin , it is more inline with a highseed ripper, like the rest of volkl's skis.
I have mine mounted at +1 and its still pretty set back compared to other twins "traditional" mount,
Id say if you plan to do any park split it and mount it in the middle of that scale, or closer to FS
But what ever you dont dont TRUE CENTER mount it, other wise you could have just got a park ski for half the price