Yamaha E116N Checking Distance Regulation

It’s surprising how poorly (factory) regulated Yamaha uprights are, compared to the Yamaha grands. All Yamaha uprights in this institution required regulation of the hammer checking distance. Doing this significantly improved the repetition.

The two hammers to the left have their original factory settings, the two hammers to the right have the new settings (checking as close as possible, without blocking on soft blows):

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