Justin, tried the app and it seems ok...as a lower handicap player I am skeptical of a ball fitting app however it is a good conceptual tool and gets someone started in the process.
IMHO
i always use a 60 open it up more if needed for shots with less green to work with or the green running away. for longer carry shots around the green or more green to work with i open it a little less and let it fly! but like the last post sand conditions…
i have just bought a 904F wood s/n: 1107881
can you tell me if this is a valid #
Thanks!