Some time ago, we had Don Mannino give a presentation to our Guild chapter. Along with his legendary video clips, he demonstrated his method for adjusting the flexibility of the shanks by shaving off a little from the bottom of the shank. His analysis of some pianos was that the shanks were too stiff, and his comparison was like that of a golf club. Swinging a golf club with a flexible shaft can produce a longer flight of the ball, because at the time of impact the shaft imparts energy stored as it straightens out. He gave the example of some pianos that he felt had reached a saturation point, and by shaving the shank, he felt he got more power. Perhaps Don can elaborate on this. Paul McCloud San Diego
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