Need help setting up DBD/Dredge-esque skill check

I’m working on setting up a skill check widget similar to DBD’s engine QTE. Using some other tutorial’s avail I’ve gotten most of the way there, but need help with some final pieces:

I’d like to have the rotation on the M_SkillCheck material (pink in the video) to be random. I’ve tried using a PerInstanceRandom node off of the custom rotator but that didn’t work. (Material BP)

I’d also like to have the success range pull from M_SkillCheck, instead of a predefined range (Widget BP).

I’m very new to unreal so any help would be super appreciated!