It is because it uses mental stamina. ;)
Chat with our AI personalities
piano.
piano
This is difficult to answer because "upright piano" is a standard and well-defined term "Student piano" is not. In 99% of cases, a "student" piano IS an upright piano.
A person who tunes a piano is a Piano Tuner. If he/she is qualified to make repairs, the title is Piano Technician.
There is not a specific word for it. Piano Manufacturer is the best fit.