I had a similar experience when I worked at a shop in Turlock, CA. We sold lots of UO-8's, and the ladies loved the UO-18's. I don't think that AO-8's and PA-10's were ever ordered. I don't remember ever seeing either of them. We sold a few PR-10's. I bought the only PX-10 that was sold during the year and a half that I worked there. It was still very rural 40 years ago and those farmers were tight with their money.

I rode a PR-10 that my best friend bought for his son. I didn't think that it had quite the light and lively feel that my PX-10 has. It's not really a fair comparison since I'm 5'10" and his son is 6'4", so his bike was a very bad fit for me.

Incidentally, his son later went to art school and got a job doing CGI for the movies. He did the nuclear detonation scene in The Peacemaker with George Clooney and Nicole Kidman. His name is Britnell Anderson. It appears in the movie credits. I don't know what he's done since.