An Update:
I hooked up with Jim McShane and brought my Harmon Kardon Citation II to his place. Two facts were readily apparent. The work area was immaculate, and the pride and passion that Jim has for his work was unmistakable. I placed myself in his hands, and he made suggestions as to replacing tubes, tube sockets, and upgrading various capacitors. Everything he did he cleared with me first. I picked up the amp yesterday and it sounds appreciably better. Smoother, sweeter, excellent sound stage, and rock solid in it's control of the speakers. Quite simply put, Jim took the best amp I ever had and made it better. The price was fair, and I give the highest recommendation to Jim and his work. He is the Harmon Kardon guy!