David, Ric, et all The idea of writing an article about this thread has peaked my interest. There seems to be two main differences of opinions. One measurement is the shank even with a third of the way down the back check, the other is the tail 2 mm above the back check when the hammer is at let off. What I will do over the next couple of weeks is look at a number of different pianos that are checking properly, and see where the tails, shanks and checks are located, along with the angle of the check, and the condition of the tail. I'll see if I can look at some pianos at several of the stores while I'm in Colorado Springs, and maybe even visit a rebuilding shop. Then, when I get back to the university, I'll look at the pianos I've got. David and Ric, if you don't mind, I'll run the article by both of you, before submitting it to the Journal Wim Willem Blees, RPT Piano Tuner/Technician School of Music University of Alabama Tuscaloosa, AL USA
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