My piano tech showed how he lightened specific bass notes

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This tech has been a blessing in all regards. In the sensitive arena of piano regulation, he is extremely meticulous and capable. Today I made a video of his work which was quite methodical and produced good results. The last time here, he did some fine repetition spring adjustments, and prior, leveled keys,  etc..   https://arioso7.wordpress.com/2015/09/03/piano-maintenance-resolving-a-weighty-problem/