Hey guys I have tinkered with the radios and found that the Airtronics transmitters will operate with the stock RTR recievers just be sure to buy an AM 27Mhz Airtronics. This way you can use the same transmitter for other cars, assuming you buy it with a receiver and a transmitter with multi-car programability. Usually you can find them for $150- 200. On both all of my RTR, Volcano, Tornado, RC10 GT, RC10 T4 the servos are slow for the steering in particular. What I did was put a rechargeable NM-HD in the cars for the radio gear giving you 6 volts having more torque and much faster. BTW the same hump pack fits the RC10 GT's fits the Volcano and Tornado. The steering servos I still felt the need to replace with something around 75 Oz. of torque and .15 @ 60 deg. I have also had a little bit of slop with the servo savers and found that if you take it out of the car you can hold the extra length of shaft with small pliers or needlenose and tighten the nut.
