Marc Ramsey wrote:
Just to confuse things further, I know of one true B model that was retrofitted
with a newly manufactured set of C wings following an accident.


.... Which was quite the saga on the highways of Nevada. Something to do
with one wing being run over by a truck. I helped Rick Wagner get that
mixer to work with the new wings. The A/B and the C control linkages
are different, as you might expect.
What we might call a "Frankenglider" (or "Phoenix") B/C is likely
what many of us thought this glider was. It's interesting to see how
many factory B/Cs there are!
Jim