Absolutely. Diagnostic measurements require regulatory approval. Without accuracy and reliability, the 'benenfit' you mention could just as well swing the other way.

What is it that you do here?

Eh... These aren't producing much in the low freq. spectrum where most of those issues occur. I'm imagining it inside the headrest. As with most things, how it's used matters as much or more than what's being used.

It's SCIENCE!

I want to incorporate that technology with one of these: https://m.youtube.com/watch?v=5z1I1grocF0

Thanks for the recommendation. I looked at "The Tool Library" and found it to be a money grab. Paying a membership fee of ~$10/mo is bogus. That's a money grab - not a neighborhood tool sharing program intended to reduce and reuse. It seems some local libraries offer basic tools (tape measures, hammers...) for loan, but it's really the specialty tools or expensive tools that need such a program. I did find a library that offers 3D printers and laser cutter rentals - that's cool and would be useful if I didn't have them at work.

Seconded. I prefer using a crowfoot with an extension, and a swivel adapter if necessary. I do a bit of automotive work as well so I have them on hand. Plus, I really despise tools that only have one or so uses. They're dead weight. If I can rent such tools, that's the way to go. We need an Uber for tool sharing.

Alright kids, get back into my balls.