The opening scene to Mission Impossible: Rogue Nation gives me work anxiety, with the Jeremy Renner as the manager who is shouting at the two people doing the work to work faster (repeatedly) and giving them directions but has no understanding of what they are doing. Then Cruise sweeps in with a new directive and it takes a few tries to get right, under an absurd deadline.

That’s where you should use something more like top / bottom /s

I think in this sense, master is more akin to the ‘recording’ master - The best version of the recording to which others are generated, and all parts merged; no ‘slaves’ necessarily just the ‘master’.

There’s some really fun chemistry in the rare-earth magnets - I used to buy them in bulk to enlarge my own IT-workshop collection, which was mostly broken down for Nd salts. Also, the magnets from iMac screens were also plentiful when HDD magnets got small (and then went extinct).