[Lights]

I think the most reasonable way to set an AA threshold in FFR is by using raw goods- similar to SDG. if AAA is 0 raw goods, and SDG is <10 raw goods, maybe somewhere between 30 and 50 raw goods? anything stricter than 30 is too close to SDG to really be valuable. 50 is a strong choice because at that threshold you're at least demonstrating some amount of control and competency on the patterns- maybe there was a bit of mashing on a difficulty spike and some bigger mistakes here and there, but you were doing something right for a good portion of the file.

(but if you think you can implement a competent accuracy% system for this, that'd be even better. i just think raw goods based fits well with the existing grades)