After an exhaustive conversion process, my Super RS4 finally runs, and dare I say very well. After ditching the mamba 7700 for the Medusa 36/60 3100kv, and a 3s zippy H, at half throttle, it does donuts. The Medusa motor is nice also. It tossed this car around like it is nothing. I need foams now as it does the tires like the 7700 did the tires on my 10th scale.