Congrats on your PB man.
Now, just work on getting more reps with ten aside, and retest your PB in about two months....you'll be surprised how scary strong legs can get when they're a priority.
Back when I used to do grappling competitively, my old training partner and I blasted our legs heavy and hard for six months straight...never checked for a max, but I got up to 27 (dead fucking serious) reps with ten aside. I am 5ft10in, and was 220lbs at the time....using only one amp of Omnadren every 7 days during the last 5 weeks of that training run.
Having the gym stop to watch is fun, eh?