Well, i just got my first ball(Columbia 300, Formula, 14lb, 2.75 top weight, and 1" pin(i think)) drilled, fingertip.  
I'm not sure how it's drilled, unfortunately i cant take a picture of it because my cousin took my camera .  But, basically the hole for my ring finger is about 1cm to the left of the dot (Where the core is, i think).  
I'm not sure if it's just me or the ball but i don't seem to be getting very much spin.  This is the first time i've ever used fingertip, so maybe i just need to get used to it.  Any tips on how to get more spin with fingertip?  
Before switching to fingertip, i just used a 14lb ball at the alley, they were conventionally drilled.  Instead of using all three holes, i just put my middle finger and ring finger in the two holes, no thumb.