I'm a proshop guy and i got about half that.
I know about clt, you are dropping the ring finger, basically to get the person to hit more with the middle finger, creating more forward roll.
i've used level finger with no offset, and usually 1/16 to as much as 3/16 or 1/4.
for myself i hit the ball with both fingers, but i calus more on my ring finger than middle, on my middle i caluss on the top left side of it. the ring finger i caluss on the bottom side just behind the joint.
this is because i use a shortend span(well a shortend span is an understatement actually) my cut to cut span is 4 1/2 middle to thumb and 4 9/16 ring to thumb.
get this, I am 6feet 5 inches...so figure that out it looks like i would have a longer span....you'd be correct in guessing that. with a standard BT fitted grip i'd be something like 4 11/16 atleast with a stretched span 4 7/8.
Cutting my span down helped me enormously with axis rotation and being able to change axis rotation and tilt more easily. Also i never have a day when i feel like i have to pull my thumb back into the ball.
--------------------
Timothy @Juniors Pro-Shop
Montreal, Quebec.