Here's a 350KB
text file to paste into Settings.txt.
Population Modifiers.zip
(Zipped up to 7% size
)
This one uses a right-hand resource production limit of 50%, and runs right up to a maxed-sphereworld spaceyard modifier.
PS: I pasted it into P&N, and SE4 rolled right through the file like it wasn't there. No problems at all.