I got rid of my SPCs because after less than 15k miles both sides ball joints were shot and the bushings had ripped apart. At that point i returned them for the defective bushings and sold the brand new set they exchanged them for. I have no regrets at all stepping up to the Icon UCAs, I had to semi-tub my firewall anyway for the 34s so the caster adjustment was a mute point for me. My alignment guy got my frontend within spec with the Icons.
Thanks for the reply. Would you happen to know if this issue has been resolved since then or if I should avoid the SPC UCA's altogether?