I'm on Mac, so am still getting used to the new RA system, having just got it recently. One major difference seems to be that RAs are impotent in the early areas. My questions for those with more experience are: 1. after how many turns, or what techs, do you consider RAs worth making? 2. is there much point in making them without the PT of ratioalism opener? sorry if this has been covered extensivly before. Its not always easy to find info here.