thank you for using polyvalent in your reply. your mastery of the english language far supersedes the average NSer.
candy, all mountain is a very general term. for someone who lives on the east coast, the silencer is definitely an all mountain ski. i know, i have a pair, and skied them for everything from park to bumps to trees to groomers. we don't get multiple feet of snow in one dumping, so 80mm in the waist is plenty wide for most everything here.
OP, i have mine mounted at core center, which works pretty well for everything, but if i were using them for strictly park, i'd probably go -2 from true center. core center on that ski, if i remember correctly, is about 4.5cm back from true center, because k2 likes to confuse the consumer like that.