Geez, man, 3oz. That's rough. Yeah, that ball's no good. Why don't you send it to me and I'll make sure it gets disposed of properly.
Really, you're only in the sense that you may not be able to swing the CG 4 or 5" from the grip center without needing a crater of a weight hole or putting the pin real low below the finger line. You can still have the CG below the midline, you'd just need to drill the thumb a little deeper to compensate for the extra thumb weight.
SH