I agree about the frequency being printed on the crystal, BUT what CHANNEL?
Not having one in front of me do the crystals have the channel or freq. on them.

Now, I fly with a JR 8103 and have all my planes on one channel.....

But I do know of some people that fly with three 8103's and only have 1 plane on each radio with different freq (channels)!!!!!!!!!

I do not know why..................

And I aggree with a previous post, why do radio mfg's make it so easy for us to break the law in changing the crystal