I now have the antenna in use! I used RTL1090 to try out the setup and I have to say - I am impressed! I used to get 30 aircraft with my old setup. Now I get 130! It's a huge difference.
It appears I was getting signals from as far away as 220 NM!
I now have it feeding to FlightRadar24 & after its run a bit, I will report on what FR24 shows me for performance. I have not tuned it - as there appeared to be no way to do that in either RTL1090 nor the FR24 feed software. Not sure if its an issue or not?
Anyway, when I first gave FR24 a spin, my contribution was just pitiful. I just quit doing it as it seemed a waste & it was without a proper antenna.
During that time I looked for an ADS-B antenna that was aesthetically pleasing, performed very well for a consumer grade product, & was affordable.
So far, this antenna seems to fit the bill! I think my FR24 feed will be worthwhile & valuable...