I think you are broadly missing the point... both the original post and my follow up ...nobody is ever going to use them on other seetings or need to re-adjust them (inbetween calibration intervals)....worst case they are disposable (they cost 20% of a standard calibration).
So you can buy a typical 4-20nm instrument or buy 5 cheap ones...and set them at 10, 10, 12, 8, 15 and get a ****-tone of clicks at those values without having to do much by way of calibration or messing about with the settings. You're talking 10K of clicks for 50 bucks with no wasted time adjusting them. That would cost you $1000 in snap on money, or $50 in harbor freight money.
Its a specific strategy that is not trivially stupid,
... if you know what you are doing and exactly what your needs are.
The other option is to just buy a stahlwille