Piano mechanics is a heart of your instrument, which is responsible for correct functioning of the keys. In general mechanics is made from wood, which may act unstable and demand care.
1. Regulation affects sound and service life.
2. Playing on neglected mechanics, you can’t control smoothness of the sound on 100%.
3. If the screws are not tightened, details might askew and lead to damage.
4. Tuned mechanics (includes keys) looks beautiful and neatly.
5. Hard process that must be done at least once in 5 years.