That my friends is a super symmetrical drilling. Choose the pin distance to PAP you want to use for the amount of flare desired, and you want the pin to end up about 1 inch above the midline. The MB dosen't have a specific distance to PAP, only that is ends up on the grip centerline. Since the pin is only a short distance above the midline, the MB will end up very far below the thumb. as Lane Bed stated, this layout works best with very aggressive covers. I put this layout on an original Rule with a 4" pin distance,and it was mellow. I could really square up to a house pattern, and get a great reaction. NOTE: this layout is not good for going left to right (right to left for the lefties). It is a midlane heavy roll, and a mellowed out, smooth backend. With a 4 1/2" pin to PAP distance, this is a great layout for high-rev players that have trouble with over reacting backends. So in closing, match the pin to PAP distance with the aggressiveness of the ball before drilling.
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Buffalo bowlers are the best all around in the country.
AMF Thruway Lanes Pro Shop employee, and I have no problem saying that I'm Officially a Ball Junkie.