I don't know if I missed it, but was there a firmware update for the weak brakes? My Justock ESC has very little braking power, even at 100% brakes. My brother's JuStock is also the same, and we're running identical settings.

Also, his 120a 1s that he's using in a 17.5 sedan has weak brakes too. I'm kinda surprised because his brakes at 85% are like my Tekin RS Pro at 50%.