If you know what you’re doing there’s no problem putting a different controller in there, but There’s going to be rewiring you need to know what kind of throttle it has what the motor is I think They use D & D motors And if it’s series or Sepex or AC Most likely Sepex - separately excited I would go on the alltrax site and download the schematic for their XCT48500 and study that, it will basically be similar for any controller Once you go through that schematic I could probably help you with any of your questions