Well, I have a Kramer ...
It is true, Alan switched to Travis Bean around the time of "Rocking All Over the World" (when everything went downhill), but I still saw him in 1977 on the Blue for You tour with his beloved Mustang. I loved Lancaster's playing, he was obviously technically limited (only downstrokes and all that), but I think the way his root note eighths would throb and the little melodic things he would play idiosyncratic. Which can't be said of his successor who is technically a better bass player, but faceless.
Classic Quo is for me Piledriver, Hello, Quo (my favorite), On the Level, Blue for you and the Live album. I still like to see Quo to this day, but without Lancaster and Coughlan they don't have that blind telepathic, even moronic groove anymore. These days they are just a tight band, back then they were unconquerable.
Watch for those downstrokes at 0.50!!!