A Bearing Edge can be a great improvement on the sound of your drums if it is done well.
Replacing humbuckers with p90s pickups, needs more space for new pickups.
In all class of intruments, a good level and preserved frets affect the comfort when playing.
Repair fingerboard and binding in Starforce electric guitar.
A job that demands a lot of people, though curiously not in classical guitar.
When adjust neck, strings rub the first frets, the nut needs to be replaced.
Restoration of an old Epiphone ft-140.