Youre pretty much at your limit with a 99mph terminal.
You either need more power/less weight or a way of improving your 60ft times( drag radials)
Nice video too...
I'm like you. Chasing no's all the time. Lol
NO2 is a good way to get a better time. Just a 50 shot would see a 13.5 maybe less in your current state of tune.