The program doesn't use any ball attributes, it's for your information only. I redid my club inventory and use a 3 digit number. Driver 100, driver punch 101, driver -100 spin 102 etc.
3 wood items range club id 300 to 325
3 iron items range club id 350 to 375
4 iron items 400 to 450 (punch shot, normal shot, difffernt spins
5 iron items 500 to 550 etc.
PW and other wedges tiems W10 to W50
It's up to you for naming setting a club id.