BBC/Plum Productions

James May has completed the last of his three reassemblings tonight with the 147 pieces of an electric guitar.

In the course of this we learn:

-Philips screws were designed for the American motor industry where the idea was that the bit would slip from the screw once the required torque had been achieved

-Japanese companies used JIS screws instead. They’re nearly but not quite the same which is convenient as JIS screwdrivers aren’t easily to be got in Europe. James, being James, has several because he’s in the habit of working on 1960s Japanese motorcycles.

-It’s better to use a long screwdriver because any deviation from a position colinear with the screw is more noticeable