I had my car aligned yesterday, and my 'after' printout shows the front left wheel has a caster value that's slightly out of spec. It's reading 5.0 degrees, the acceptable range is apparently 5.1 - 6.1. The right side is reading 5.2 degrees. From what I can tell, caster isn't adjustable on a stock suspension. I don't know if the car was weighted down per BMW's specs, and the fuel tank was half full vs. full. With that said, the specs I'm going by are the ones from the tire shop's alignment machine so I'd find it strange if they were reliant on the car being weighted correctly. Any suggestions on what might need to be done to get this back within spec? Everything else came out looking pretty good after the adjustments, and the car handles infinitely better.