Further Clarifications "tinny sound"

Absolutely not. To level the strings, there is a precise tuning hammer tool that restores the so-called "leveling bend". If you can, send me some images.

Hello Pianoexpert, could I know a bit more about the tool used to restore the leveling bend? (how it is made, where to find it, etc.)

Regards, Sergio.

Restoring string planarity with this system is a controversial opinion. The tool itself, which can even be homemade, is not enough. An aligner is also needed to check the strings. I would say it is an expert intervention. However, you can easily check instead if the hammers strike the three strings simultaneously. Just lift the hammer lever slightly with a small hook until it contacts the strings. Pluck the three strings and the sound must result in being "stopped" for all three.

Thank you for the timely response. I noticed that the hammer does not strike the first string well because by inserting the rubber wedge between the other two, pressing the key produces a sound similar to the one emitted when the damper is not properly lifted. Could this consideration be valid?

Thank you, Sergio.

In this case, the hammer must be centered on the strings

Well, I obtained improvements by centering the respective hammers. I acted by loosening the screw that fixes them slightly and then delicately regulating them. Is that how it's done? Sometimes I remove the action. However, sometimes I do it without removing it. What is the best system?

For some time now, a key has been bouncing after releasing it. It hits the keyboard lid (only when it is completely open) making an annoying noise. Can I adjust any regulation to avoid this?

Thank you, regards.

It's fine without extracting it. The bounce might depend on the central hole of the key being a little wide.