No clue what the kid means, but you can use any radio you want with your baja.
I love mine, other than the e-clips on the hubs, but I fixed this by tapping the hub, and using screws to hold it on. They'll never come off again.
Oh, and the rubbing, but some extenders will fix this, or even some creative drilling on the arms that moves the bottom shock mounting up, so even if the wheels rub, it doesn't rub on the shock itself