Does this still apply?
Currently, the mentioned file already contains the lines:
@category:NEEDS[NoNonRP0] = -1
@TechRequired:NEEDS[NoNonRP0] = ORPHANS
I tried changing these to:
@category = -1
@TechRequired = ORPHANS
But no effect. Non RP-0 and nocost RP-0 parts still show up in different nodes and in my parts list in the VAB.
Is there a good solution to hide Non RP-0 and nocost RP-0 parts?