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Man-in-the-Middle PCB Unlocks HP Ink Cartridges
(hackaday.com)
This is a most excellent place for technology news and articles.
Get a safety razor. I got one a few years ago and it's been amazing. The blades are much sharper (or at least feel that way) than the modern 4/5/6 bladed thingies, last longer, and are like 20€ for a 50-pack.