Jess,
As Raven said, I believe if most people are using a SBG on dry-ish lanes, the pin needs to be relatively high. The problem as I see it, is that urethane tends to grab the lane earlier than resin. This is the case even with polished pearlized urethane, like the SBG. Unless your release has higher ball speed than rev rate, or you intend to use it on medium-light to medium oil, a higher pin is required to get a comfortable ball length.
I rarely use pin above the ring or bridge level, but I do have it on my SBG. I works well in that configuration.
The SBG, due to its cover and core, should work well on a drier sport condition. I'd be inclined to kick the CG out slightly, that is, closer to the PAP than the pin, but not by a whole lot: maybe a 4.5"x3.5" type of drilling.
FYI I wouldn't recommend sanding this ball, as urethanes react a WHOLE lot differently than resins do to changing the coverstock surface.
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"None are so blind as those who will not see."