I started playing with thumb pitch over the summer. I've changed now from 1/4 reverse to 0, and am starting to understand by feel exactly how much I've been squeezing the ball all these years. From where I am right now (0/0) I need to stay in the ball a little longer, which I believe additional forward thumb will accomplish. But there's an approximation of span change that should accompany pitch change. If memory serves, it states to decrease span by 1/8th for each 1/4 forward pitch increment....
Nothing on this in my notes though... What's the suggested span change?
Thanks

Nothing on this in my notes though... What's the suggested span change?
Thanks

This is what I have in my notes: (though I don't think it's a hard and fast rule)

"If your span is correct and you want to try less reverse, shorten span 1/16" for every 1/4" change in thumb linear."

Update:
I did some looking just to check, there appear to be several methods

Method #1-"If your span is correct and you want to try less reverse, shorten span 1/16" for every 1/4" change in thumb linear."

Method #2-"shorten span 1/8" for each 1/4" thumb pitch forward."

Method #3-"The Half rule, where you Shorten span by half the amount you move thumb forward.

1/2 forward = shorten span 1/4
1/4 forward = shorten span 1/8
1/8 forward = shorten span 1/16
and so on..."

Method #4-"If the span is correct, for every 1/8" you adjust the thumb pitch forward you need to shorten the span by an 1/8"."

If your span is actually correct, you shouldn't need to adjust it.  It was the pitch that was wrong, not the span.  From when I shortened my span to the "new" correct measurement (not stretched like most everyone did 15+ years ago), I have gone quite a bit more forward and haven't touched the span.