Kurt,
The gun is a single trigger.

I have not excluded that there is a regulation issue.

I am starting to question whether cast can create problems with lateral POI shift that are undesireable.

Given that it is crossfiring, If I simply loosen the rib/barrels and spread them, I should be able get them to both impact the same, but they would be left of point of aim down the rib. I'd still need to move POI to the right. I'd just like to do that first, then deal with any regulating.