RE: Illegal radios?
There's a big gap between the "law" and the practice.
And these frequency swaps are NOT done surreptiously when frequency conflicts come up at contests...
read this part again...
"Changing a xmtr to another channel allowed for RC use is allowed and practiced at National level competitions, yes even at the AMA site, onsite. Certain venues such as pylon racing and combat it is routine to have crystals on hand to swap out to solve conflicts."
Experienced fliers will have a complete set of crystals to cover contingencies..
Other places on the planet DO permit swapping crystals at will....