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I'm sure if she shared the news about the "artezian" (artisanal?) spring it would have added a bunch of fun for the archeologists, the city, historians, family who are/were related to the house (if they found out) and more, while maybe not being so fun for your entrepreneur friend.
Artesian: it refers to groundwater under pressure.
In that vein, let me say that I have neither the skills nor the equipment to evaluate any of chx's technical concerns. The best I can say is that it seems to do what I want (pass power and TB3 with a magnetic coupling), and there haven't been any symptoms of problems that I've been able to see. Yet. I'm now a little worried, though :|
The 24-pin one here is what I'm using: https://www.amazon.com/dp/B0896QK2J5