So here's the body off pics as requested. The nice thing is that this buggy uses a standard Spektrum DSM2 RX. A micro would fit nice and allow you to save weight and possibly use a longer canned motor. But I have no idea what fits in this chassis. People are reporting 50mph+ with the stock 4500kv system. But it would be nice to gain features like Punch Control or Torque Limiting as found in the Castle ESCs.
Still, I'll leave the motor system alone for now.
Pic 1
Pic 2