The Gibson didn’t do well on the sales floor, given that everybody and their mom can tune a guitar. Pianos, though, are another story. [Don] is looking for investors to bring his idea to market ...

Pianists? They have it easy! Set and forget. But every time you pick your guitar up to play you'll need to check it's in tune. So invest in a decent headstock tuner and pedal tuner. But what if ...