I'm thinking that it's too big to have each research of the repeatable techs worth 10%.  I was thinking of replacing the infinite techs with one +10% tech and then a repeatable +1% or +1.5% repeatable tech.  So after forty researches of the same tech (which the AI can do on high difficulty levels) you would have +50% or +70%.  I think the repeatable techs should only be there to provide a reasonable but minor boost to whatever they are boosting, rather than a massive boost each time, and mainly be used to have SOMETHING to research once you've finished everything else.

Would people be interested in such a core mod?

Look forward to your replies!  You might have noticed that I mentioned two once-off +20% accuracy boosts in the LH Modding section, but I kind of like the idea of all repeatable techs be worth +1-1.5% and have a prerequisite tech of a once-off +10% as a mini reward for reaching the end of that tree.