Upgrade Slingshot Feat
I am currently working on reaching the feat "Upgrade your Slingshot 10 times." I currently have 8/10. I have upgraded my slingshot twice by completing two hats sets, but it still says 8/10. Is there anything special/different I need to do in order to reach 10/10? Right now my slingshot score multiplier is +11 (so over 10)
Thanks!