In these videos, the truck is running on 6s lipo, 1st gear, Tekin RX8 with a T8 1350kV motor. It is otherwise stock.
In related news, in two years of Summit ownership, I have finally broken something on it, the front right lower A-arm. It was zero degrees and I cartwheeled. I can't believe how tough this truck is. It has been brushless for a year now, and I have seriously abused this thing bashing, jumping, and pulling stuff around. I am very impressed.