Okay, I am dredging up this old topic to ask a few more questions
I am not at all familiar with drilling patterns and pin placement and (insert other drilling terminology) etc, so I thought I would come here and ask those in the know

My understanding of the "pin" is a very small indentation/discolouration on the bowling ball. What exactly does it indicate? On my old
AMF Angle, it was on the complete opposite side of the ball to the holes. If I was to hold the ball, a line going through the middle of the pin would go straight through my palm. Now, on the Sumo that I am using, the pin is slightly above and to the right of my finger holes.
The Sumo plays a lot differently to the Angle but I had just put that down to the different surfaces of the ball. However, the ball
Track of the Sumo is a lot different as well and since I haven't changed my delivery action at all, I can only assume it has something to do with the pin placement.
Now.... what does this all mean for my bowling?
Cheers!