I know that several glider operations in the US have negotiated "wave
windows" to allow gliders to fly in wave above 18,000 feet. At Jean,
we sometimes get thermals (near Mt. Charleston) that extend well into
the Class A. (though how far, I don't know, since I can't go there!)
What is the process to get a waiver from the FAA, and how difficult
is it? I'd like to get my diamond altitude, but have limited
opportunity to travel.

TIA
Jim