Dont know if close to Halloween or one to many energy drinks but have a idea. Crazy but an idea.
What if the PCB could be setup as a plugin? This way you could change freq just by unplugging the PCD board and switching with another. There are no freq componets to change just power, steering, antenna and drive.
It may not be that practical but if you had a ZZ and Bit could switch PCB as easy as changing motors. Would alow work on the car a bit easer than it is now etc.