On Sun, 10 Jan 2016 18:01:58 -0000, Tricky Dicky wrote:

A number of my old woodwork teachers who were "old school" cabinet makers insisted that slotted screws in close proximity to each other or on adjacent hinges had their slots aligned.

I thought everybody did that - I made all the screws in my wall sockets horizontal. Pozis don't matter so much.

To not do so is similar to having your furniture scattered randomly around the room instead of in line with the wall.

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In 1272, the Arabic Muslims invented the condom, using a goat's lower intestine.
In 1873, the British refined the idea by taking the intestine out of the goat first.