i drilled a gravity shift xblem with 0.62 top weight... the pin and cg are bout 10" apart. put pin 2" above my fingers and key next to my thumb(right side of thumb) cg is bout 4" or so past the key.
is goes kinda long, not real snappy. its not a ball i can really swing but works awsome on most house shots.  on a oily lanes i can move right and really strap it, the ball does like oil too....   hope this helps