Sadly while using colonialguard the mod doesnt work :(

coyote Just now
Works great!!! Not only that, also it is a fun challenge to kill the megacities of the AIs :-)
Thanks a lot for your effort and your patience :-P

Okay. I found it. And the new sector at 16 was not what caused the annex thing to be at 0 pop.
Well, time to change it all.

Okay, it seems to have something to do with my own test mod that lets me do stuff faster. Now, only to understand WHY that is.

hmm... Why does it work for me and not for you, though...
Can you give me some info, which faction, what mods, etc.?

huh. Thats weird. Worked in my testings. Let me check again

The +1 sector at 16 pops works. The "need 0 pops to be unlocked" sectors after 16 pops doesn't. Still needs 4 pops to get 1 sector more.

This:
that once you reach 16 pops, you get an additional sector and each new sector will require 0 colonist.

I believe would solve everything, and allow megacities (finally) :-)

So, question is:
I can do it so, that once you reach 16 pops, you get an additional sector and each new sector will require 0 colonist.
Alternatively I can add about 12 or so additional sector range, up to 50 (in the same steps as normal) so that this effect occurs once you reach 50 pops (though I am not sure the list can be that long, would need some testing). Mind you, that also increases the amount of sectors you can annex at once.

Any interest in that feature to begin with?

Ah. Yes, thanks a lot. I havent thought about this. I will revert it.

After the latest change to this mod your extended sectors stopped working and i couldn't annex more than 4 sectors even with residential ones.
The tooltip said i needed another 75 population for the next annex so i have disabled this mod.