Since I had to order a new door glass for the left door, and since Zenith has changed suppliers over the past coupla' years, Zenith sent me two new doors and strongly suggested that I replace the right door as well.
When I unpacked the new doors, I thought I'd just leave the right door as-is, using the old style plexiglass.
However, there was a pretty big diff in the bubble depth between the old and new - over .7", so I was concerned about effects on drag. So, off with the old door glass and re-installation of the new right door glass.
These new doors are very nicely done - hardly any trimming at the door opening; no cutting to trim at all - can be done with a belt sander.