When you use the strut rod to dial in caster you are doing it wrong. Use the UCA to relocate the UBJ. There are a number of aftermarket tubular ones that are designed to add more than the stock UCA.

When the forward pivot of your strut rod is not in line with the LCA pivot pin, you are doing it wrong. That is a design flaw, pure and simple. Easy to fix in the design stage, if you know what you are doing and not slapping some junk together to sell to the unsuspecting.

They say there are no such thing as a stupid question.
They say there is always the exception that proves the rule.
Don't be the exception.