AAAA

It does make them bigger but leaving and reentering the R&D building returns it to normal. I didn't have much time to test it but it does seem to make a node unresearchable if it only has one parent node and it's empty. Overall it works fine for me as i have lots of mods(i have 64 bit KSP) so i only have a few empty nodes.

This works for me i no longer have any empty nodes in the tech tree. If anybody wants it i have compiled it and uploaded it to dropbox here is the link https://www.dropbox.com/s/sy9c2vfahqrnun4/HideEmptyTech.dll?dl=1 All credit goes to nathan1 i just compiled it so you don't have to. Just drop this anywhere in you gamedata folder and it should work.