Much of standard 1911 extractor tuning techniques should work.
Set the tension of the extractor, and give it the same bevels as a 1911 part as a start. Make sure the extractor isn't "clocking" or rotating in the slide.
Here's some info on tuning the 1911 extractor, and there's some video on the Brownell's site.....
However, if the gun is reliably extracting and ejecting I'm not sure worrying about 2:00 o'clock ejection versus 3:00 o'clock is a concern.