its fucking retarded to center mount skis. I mounted skis for plently of pros, and plus 4 is more then enough. Center mounting skis is rougly +8.5 on a 174 ski, which is alot. Dont do it, it will make them ride like shit. the only positive side to center mounting is that you can officaly say that you are gay.
if the skis were ment to be center mounted, they whould have the mount line there.
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I got 2 sets of New in wrapper 04 Scratchs for sale, both 174's, one with Look racestock bindings, one with rossi scratch bindings. PM me with a resonable offer for eather.