Sport, please do not lead others astray on this issue. I realize you are reading the regs and trying to draw conclusions, but you are off base here. You cannot change the TX xtal, even if it is accessible from the outside of the radio. You do need to be certified/qualified to perform the xtal change. If you want to change freqs on the TX, get a synth based radio or a radio that uses modules. You can swap user accessible FCC certified modules without an issue.
I never said otherwise!!!! Go back and read the post. I said the Futaba site is outdated because the FCC license is no longer required. They got rid of a bunch of radio repair license requirments years ago, about the only things requireing licence is broadcast and aviation radios. However that does not negate the requirement that those repairs be made by a certified repairman. I believe that presently the certification is coming from the manufacture not FCC. And I still say the radio manufacture needs to start putting that crystal inside the radio! I am not so sure that the FCC can do anything about the user changing it, the reg is clear as mud on that. I did not say it is wise to change it.
I know you don't think I know what I am talking about, so I have linked where the FCC says when radio license is required.
http://wireless.fcc.gov/commoperators/wncol.html
Note you do not need a license to repair R/C. However you may not modify them, I think changing the crystal is a modification, at least if it bleeds into other channels.