Uuuh, actually things are becoming more complicated than anticipated, as usual

!
I started with "should I play TDM or DevNull", now it shifted to "Proportions vs P&N", and both seems to fit my preferences, so

...
SJ, thanks for the population weight param... If I make 1 pop weigh more than 20 kt noone will get there but will I still have a colony ? And could I populate here thereafter by sending transport ships (ie if it weights say 100 kT will a transport with 100 kT in 5 cargo comps load 1 pop or none - is the load calculated per component or globally ?)
Only other question left is what mean the "Min pop per facility" param ??
As for p&N Version I only have SE4G, so I'd have to use P&N 3.0, no choice - but it seems fine !
About the production rate, in fact I didn't imagine that pop could get to 60B, and that Spaceyards and Resources have different modifiers...I was only referring to resources in my first post.
So I have to think a little more on what I want : having 7000% increase would be silly, there should be some cap here, as yards and plants can only produce to a certain extent and overpopulation shouldn't be a good thing ...
For resources perhaps a "linear by steps" function : linear increase vs pop first (up to say 100 % for 2B) then less than linear (up to say 250% for 10B), then still smaller increases (300% -40 B) then capped ?
And for SY I really don't have a clear idea if it should follow the same pattern or a different one ..
.... uh, my head aches .. I have to stop !
Thanks for your help, SJ, I'll ask you when I'll have clearer ideas

- anyway it's pretty easy to do with Excel.