Rain on my parade, will ya, Randy?
I figured the (lack of) efficiency of the vortex tube might be what makes it undesirable.
Schlepping ice before every trip just doesn't appeal to me.
I like the fan-cooled seat cushion idea, too. Waiting for Daox's review.
I also like Trik's idea of the electrically-driven Goldwing compressor. Just haven't had time to research it yet. I suppose I could put up with recharging a battery every night.