Wow...that is crazy. It is an x-out with basically a zero pin and it should react pretty normal due to the fact that they drilled the extra hole above the fingers to get the finger weight back to legal. Personally, with those specs I would have drilled it with the pin below the fingers but I guess they had a certain motion in mind and went with that.
As far as motion that is more dependent on your style than anything else but for the majority of bowlers this will get decent length down the lane and have a strong continuous motion. If it doesn't seem to work well for you have it plugged and move the grip up and swing the thumb left away from the MB to keep the plug work away from your track. But lay it out and check the angles first and compare them to the angles on your favorite stuff. I always do that before I punch a ball.
ALL STAR BOWLING & TROPHY
LANGAN'S ALL STAR LANES
IBPSIA MEMBER
WALLED LAKE MI