Complete reverse...are you sure? For those specs to come up anywhere close to legal one of the two things would need to happen:
1) Really low top weight...else you would have a ball with too much button weight.
2) The ball would be a pro-pin with a mis-marked CG (seen it, but it's rare).
I've seen someone roll a bottom weighted ball before...seemed o.k. but not something I would be willing to try.
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-Chris: DJ's Pro Shop : Auburn, MA