I try to get them just slightly off center so under a load they center up. I also have a heavy piece of teflon that I can bolt to the houseing while rubbing on the ring gear, this really loads it down when turning the pinion for checking tooth patterns. I always had trouble holding the gear tight while turning. With it really dragging you get a better pattern.
Yours is really close, pulling the drive side a little more to the center would be better, but its likely close enough as is.
