Open67 - as you can see we can debate anything. The answer to your question is whatever you like because there isn't much difference between a 6 & 8 MOA dot for USPSA.
I talked with Brandon about this procedure with one of my SV Limited guns and he recommended sending it to SV and the work would be done for free, my gun was build by SV.
I use Decot Rx shooting glasses and they can modify each lens differently to allow you to have a front sight focus with your dominate eye and the distance focus with your non-dominate eye. This combination works excellent! I also turn 50 this year!