I set up a traxxas tq3 for a blazer, and a hilux and they work mint. I've picked them up from e-bay for 33 bucks shipped to my door. Radio, reciever and crystals. There are lots selling without, but look for the whole deal it happens. I now have done 3 of these radios. 1 hour max time to do it. A switch from radio shack is 4 bucks, Purchase this switch, or one similar. Must be a center off for shifting, rock crawlers want a momentary for rear steer. Pull your crystal and batteries out. Remove the 5 screws from the rear of the radio, #1 philips. Seprate the 2 halves making sure the entire electronics stay in the front half. Notice the grey center wire on the traxxas red rocker, this wire must go to the center of your new switch. The black and white go to the 2 outside terminals. Take your iron, or gun and desolder these wires from the rocker. I put my spdt switch up in the top of my radio so I need to lengthen the 3 wires. A good idea if your going to drill is to remove anything close to your hole. I know, wrecked a steering pot and had to steal one from a 2ch radio. :banghead Dull drill bit :banghead Solder up the switch, and install in either the rocker hole, or the new one you made. If you mount it near the steering remove the extra (second) nut to stick the switch out farther. Put back half back on carefull not to pinch any wires. Pop in the crystal, and batteries and test, servo reversing will change top and bottom positions, and there is a (screw driver) trim adjustment up front to center it.