I'm glad you found something you are happy with.
We usually recommend staying on Vigortone for a year to see the ultimate in results.
Vigortone will go in and take grass and water samples and formulate a
mineral specific to an area, if necessary. I know they have had tremedous success with Fescue Balancer, however, since we don't have Fescue, we have not used it ourselves. They formulated a mineral for an area known for scours here in Montana. It worked so well, that now everyone in that area uses it. That did take a special formula, they added Biomoss also. But it has met with huge success.
Anyway, nice that you found something you are happy with. That is the main thing. Mineral can do so many good things. Incredible, really, what it can do.
I do have to take issue with your statement, "mineral designed by local guys is better every time." I have never known that statement to be true, except maybe in your case. Lots goes in to making mineral and particle size is of utmost importance. Hard for the smaller guys to be able to do that. Pretty much impossible, really. And they don't have access to the best ingredients either.