Built Right UCA Alignment too much Caster?

Got my alignment done yesterday. Numbers look good for toe and camber. But getting too much positive caster. I'm getting 4.7 and 5.0 positive caster. Optimal is 2.4 for 33" tires. Tech says that's the best he could do and its because of the uca.

Not sure if I should take the tech's word, or go some other place and get it realigned.
My question, can caster be adjusted? Or is it fixed, because caster is built into the uca?

 

it can be adjusted, but it is changed by the UCA. Go to another shop and see if they can do better then follow up with Built Right.