I have been working on this quite a bit, have now switched to a mamba max pro esc with an Orion Vortex 8 (2050kv) motor. Its the motor form the Kyosho Inferno VE, only a 2 pole so less torque BUT im going back up to 4s . A Zippy 4s 5800mah, made up a wheelie bar but in this test run the ground was damp and not much grip to be had.