I had my impulse zone drilled to the dry standard with the psp about 1/4 inch off the thumb,  I was concerned that the ball might hook too much with my slower ball speed.  I find now its a little too mild and would,like to get more back end performance.  Any suggestions how I might achieve this?? I also have several quantum balls ( fire, jade tour, denim,burgendy (urethane) and 3 ravens.  I would,like to get the specs on the raven as I have the specs on the others.  
thanks,  Dr "C"

I have one set up just like that with similar style and speed.
My other IZ is drilled with pin slightly above and right of the ring finger, psa is about 2" right of thumb (basically stacked). This ball rolls about 5 feet sooner and is quite strong on the backend. I even hit it lightly with a burgundy scotch brite pad because I wanted it to roll earlier. It's the best ball in my arsenal now. Maybe you should try this drilling.