No "Return to Center" Steering Woes

[SCOTI]

Originally Posted by kberger

Did a 3/4" LCA shift forward plus the 5 degrees added from CPP UCA. I'm pretty confident in this measurement. Driver camber is -0.3 degrees and Passenger camber is -0.1 degrees. Toe-in at 3/32".

I'm not purposely trying to be that aggressive on caster, just trying to figure out why no return to center.

I understand you didn't intentionally target the +15° Caster. For me, the question would be what issue/s would/could that amount of Caster cause? Too much of a 'good thing' logic.
Is that additional Caster impacting the effects of the steering axis/geometry side of things cycling L-to-R @ the lower speeds associated when making turns (where the steering is expected to return to center vs changing lanes type of turn)?

Personally, since you forked over the $$ for those CPP arms, I'd put the lower control arms back where they're supposed to be. Get the alignment closer to the aggressive limit for Caster (+7° is aggressive) & see if there's a difference.