[Jourin]

I agree with Rollo. A mix of 50 and 25 is needed and not one or the other. I was going through the Earth Alliance research file which is almost all 50 and comparing it to the Pyrochette which is almost all 25. In an EXCEL spreadsheet I listed all the techs in the order the AI will research (for just the first 20+ techs) and compared with the cost. Basically low cost should be no higher then 25 and high cost or key tech break points (those that reveal desired hidden tech) should be 50. Example Phyics 1 at 50K should be 50% while propulsion 1 at 10K or Smaller weapons at 5K should be no higher then 25. Industry should be 50 if the intent is to get computers but maybe computers should be 25. I found that around 20K was a good break point for the early game with around 20K or less being 25% and those greater being 50%. Although I haven't tested, I think for later games the break point should be increased to 50K. I also experimented with combos of 5,10,10 and 10,15 (keeping in multiplies of 25 for simplicity) but did not see a significant gain to offset the complications I had keeping track. Just my opinion if I was designing the research files, but since I am not, I just want to thank you for all your hard work.