Can anyone give any tips for fitting a conventional grip?  Where should the span sit?  Which forward/reverse pitch to use for thumb and fingers?  I have read on another forum that you use the thumb pitch conversion chart based on the span.  And use the same pitch for the fingers.  So if the thumb is 1/4 forward you would put the fingers 1/4 forward?  The thumb is pretty straight forward, but how do most drillers do the linear pitches for the fingers?

I use to grip the ball due to a huge reverse angle on my thumb, 1/4" and my drill from finger to thumb hole is 4" 1/8, on the other hand my fingers have no reverse or forward, so I guess its pretty much trial and error based on what you feel confortable with, the real thing is dont grip the ball.

Best regards

Watch the under type angles as the bowler will more than likely tend to grip the ball anyways...as well as their fingers are farther in the ball slowing the release

That is what I was afraid of. With this span (2 7/8") the pitch will be 11/16 forward(under) in the thumb.  I thought fingers at 11/16 forward(under) as well would be too much and maybe difficult to get out of.  But this is for my girlfriend and she is going from 11 lbs up to 12 lbs so I want her to be able to grip the ball.  She refused to go with a fingertip grip and thinks 12 lbs is going to be too heavy and too hard to hold onto.  I'm thinking about putting a hole for each finger just so she can hold onto it.

I would never go more than 1/4"
When you think if it if their digits are that small plus span it needs to be in moderation...

for fingers ..? Or any of the pitches?

     I use to use the IBPSIA chart when I first started 18 years ago but over time as I started understanding pitches, I have found myself not going more than 5/16 and that is usually on your bowlers with small hands. Adults I usually do not go more tha 1/4 unless they have some physical condition that prevents them from hanging on without excessive squeezing.

Thank you for the info.  Sounds like 1/4 forward is the consensus.