Which Surefit weight should be used to get to a D2 or D3 swingweight for my 910F fairway:
-910F 17 degree
-Ilima 61 regular shaft (not the 71)
-shaft is 1/4 inch short of standard (finished length is 42.25")
-but grip is a bit lighter than standard -- a 45 gram Tour Velvet .620 rubber grip instead of the Tour Velvet 360.
Thanks!