Crazy alignment problems

how are the UCA's identified? Are they idiot proof, so they can only go on one way? Hopefully, you have the left UCA on the left side.
I know I've seen some postings on here in the past, where the tubular UCA's didn't fit correctly. I never paid attention to which brands they were.

Didn't see the answer on this? Are the arms marked drivers side, passenger side?
Most aftermarket arms claim to give more positive caster, if installed backwards they'd do the opposite.
And yea moving idler arm up or down will definitely affect bump steer.
And we can certainly set ride height on an uneven surface, factory service manual has you comparing two measurements on the same side of the car. as long as tires match that should be sufficient.