It's June of 2016, Powerbook G4 still useful and going strong
40 - 50 minutos
Hard drive gave out with the traditional horrible Klingon death screaming sound.
Have a multi-tip screw driver set with Torx, Hex, and Phillips heads easily accessible and replaceable, or a large collection of dedicated tools.
Have a magnetic mat divided into individual squares to place your screws in individually-numbered areas.