The Piano may need to stay at the workshop for approximately 2-3 months during the repair works, such as replacement of the hammer and restoring or rebuilding the action or complete replacement, restringing all music wires, check down-bearing and crown, repair soundboard and bridges etc.
The need for an overhaul, depends on the usage and age of the piano. It is often needed for pianos more than 25-30 years old.
your favorite piano by repairing and overhauling it.
How about your piano?