Thanks to Larry in San Diego for his questions.
Here they are.

NOTE : ABOUT TUNING : Dear all, since publishing this video I have had many comments remarking that their 12 strings do not go out of tune. This may well be true if played lightly in the same place with a constant temperature and humidity.

My guitars go from cases to be be played at home, at rehearsals elsewhere and to gigs. That means that the environments that they are played are variable. Also the tuning machines are somewhat worn from some fifty years of wear, and it is rather difficult to adequately compensate the 2nd course strings to A. That's the way it is. Thanks for watching.