For Mark,
Can you remember the model names of the top and mid level bikes, and basic differences? I have one and a friend has one--both of us owning them since the mid '70s. I used to know this stuff but now, well... It comes up from time to time. There's no mention on the CR site. If everyone is bored with this, I could take the answer off-list.
regards,
Bob Schenker
Oakland, CA USA