Gripping surface to gripping surface, both spans are 4 11/16", my RF span is shortened 3/16" because of severe joint stiffness (plus 5/8 reverse pitch on that finger). I think you're in a good ball park with what you're planning to use. Thumb and finger pitch variations can be taken care of on a trial ball by using smaller or larger inserts. I've thrown balls I couldn't get my thumb or fingers into over half way well enough to see what the reaction would be. -- JohnP
