One (or two) things I'm not seeing and real answers to, are the very two problems raised in any install.
Making any system show a low SWR - requires some form of transformation.
So there the one issue back at post #35 about the "non-resonate" (ping reference) so SWR may not be the best at the given frequency because of the elements are not properly sized.
And the other...
Being the true feedpoint impedance - that in one post #13 - you cannot just make an assumption for this ...
For this would make any magnetic mount - or even a resonate 1/4 wave vertical even physically mounted and grounded - as unable to qualify to even be considered viable - yet people use these things every day.
So to me, "Generalities" are nice to help other understand, but [USER=21346]@The DB[/USER] went thru a whole process you seemed to missed a few points on - one glaring event is we have the ability to generate any antenna thru models but the equipment used to connect these requires the use of some type of transformation to obtain 50 ohms that we can get a "generalized" overview that by a low SWR it must mean it's good.
It depends on the old adage...
Sometimes you're the Bat - Sometimes you're the Ball.
It just seems a little unfair that [USER=21346]@The DB[/USER] gets brushed off without ever looking in why does the world need low SWR - is it for the efficiency or because whomever maketh the coax - determines the fate of what everyone else must use...Or would it be more polite to presume that those that MUST require a LOW SWR - do so to avoid a warranty violation issue - more so than to say - "Hey - this coat hanger really works - you should try it!"