Well 'Doc, one of these days I might get to be perfect too and fully understand the world around me.
Most of the models I mess with are pretty simple, and that should be easy for the software guys to handle the calculation necessary to reproduce what goes on with these simple CB type antennas, plus the calculations have been around for a long long time, and I'm pretty sure they have been fine tuned, and I know the process for doing the math has been speed-ed up considerably by the application of the math to the personal computer.
So, until somebody can put me straight to how much difference these models show compared to what only God really knows, I'll continue to produce them as some evidence, right or wrong, for what I see and do.
Now if en' when I get to seeing a 1/4 wave whip, showin' me a pattern that indicates a 11.55 dbi gain on the horizon, maybe then, I'll draw up with a plug of Days Work, and start to ponderin' my work again, as I holler, "Spittttttt" to my buddies riden' in the back of my pickem' up truck. 