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’.

“Sir, this is a Wendy’s”

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).