Your LSAT score seems high enough to mitigate the 'lower' GPA, even for some of the t-14. If it were me, I wouldn't even address the GPA issue with an addendum. I say this because I've seen some personal statements/addenda which try to explain a lo…
Loophole is fantastic! My advice: take time reading it through, AND be patient with yourself afterward. You will want instant results, but it takes time to put the information to work. Patience with yourself, generally, is my advice.