If it has a module in the back of it, you can legally change that module to change the freq. You just can't change a crystal in the module.

I have sent them in before to be changed, but it has been a long time. The turn around on Futaba is usually really fast. The last time I sent something to them was a receiver I screwed up and they had it back in less than 15 days. It was nice, and because it was only a week old, it seems to me that they didn't even charge me, even though it was my screw up that hurt it. That was nice of them.