Phillip wrote an answer about Black Diamond AMPerage Ski on March 4, 2012
I mounted mine +2.5 from the factory line and they are great there. BD Athlete Johnny Collinson mounts his something like +4.5 and he does well with that. I'd say +2 is minimum. Not sure what center mount actually is. You could probably to it as the pintail shape of this ski will keep the tips from diving too much in powder.