Sorry if this is something that's been addressed, I've only read through a few pages of this thread.
I can't unlock anything at the 500 science level. I only have this and a couple of your other recommended mods, the research station is upgraded to allow up to 500 science to be researched, and I've got plenty of science to use. The message says "technology has unresearched requirements", but I've unlocked the node that it says it requires. It seems to do this for all 500 level nodes (I only have three up to that level, but I assume it persists for the rest). Is this a bug, or intended somehow?
Thanks, otherwise I'm really enjoying this mod!