I bought a T-Maxx 2.5 used from a friend of mine, who bought a lot of 3 trucks, and it came with a JR Racing XR2 controller. It doesn't have reverse and is kinda beat up. I wanted to use a TQ 2.4ghz but I'm not sure what I need. Can anyone let me know what I need to make that swap or has anyone done something similar. Any help would be much appreciated. Thanks in advance..