And on to the method for adjusting my technique to the GC82S: I have decided the best way to secure my technique for the different touch required is "back to basics". Segovia scales and Sor studies, "Slurs, Ornaments and Reach Development Exercises" by Shearer, Tennant's "Pumping Nylon", etudes by Aguado, Carcassi, etc. Once I wear out the first set of strings, I will install the same Augustine Regal/Blue strings, but use the Diamond string ties to slightly increase the resistance to attack. I can feel that I am on the right track and should have things in hand (pardon the pun) in a few months.
The sound is very balanced across the strings and I have been enjoying learning "El Noi de la Mare" by Llobet (many thanks Sheldon) and Home by Andrew York. The beauty of the upper registers is striking and well supported by the ample mids and sustain of the basses.
1971 Yamaha GC-10 (Hideyuki Ezaki)
2017 Yamaha GC82S (Akio Naniki/Naohiro Kawashima)