Hi Jeff, thanks for that great post!

I've heard about the horror stories about the '92 and later "Zeniths" (the name goes on before they're shipped from Korea)

You nailed what I was getting at regarding the RCA tube having the newer style (better?) masks. Some old timers have told me that genuine Zenith tubes did seem to last longer than RCA ones, but that may end up becoming the Ford Vs Chevy battle (which by the way was won by Chrysler! )

If you were to interchange the tubes would you then use the yoke from the chassis that the tube is going in (to match the circuitry) or the yoke that went with the tube? (to physically match the neck)

What you said about the Avanti is spot on as I've found this picture since I my previous post (see below)

Anthony