UCP as it fixes many bugs in the original game (read the first line of the description of this mod which tells you how to install). And the 5X UCP compatibility mod.

The description of the 5X mod actually recommends the above mod/improvement and another mod that expands the game.

Nice, thank you. Will take a look.

Curious. Do the big universes take a long time to create? At the hour mark for the largest universe. Bar moved and is now 1 pixel from finishing. Is it normal to take this long? Thanks.

1 hour sounds a bit too long, but several minutes for the biggest map ist a thing.

I recall reading something where sometimes a universe creation cannot be completed. Something conflicting in there. A massive cluster universe takes less than 10 seconds for my computer to generate. But maybe that is computer memory/SSD disk dependent.

But if it takes forever to complete (many minutes), then it is likely stuck and won't complete. I have heard about it, but never experienced it myself.

massive is pretty fast generated. i think the biggest possible map is brobdingnagian, only circle. i never played that one seriously, but i think you hit the end of the tech tree during expansion phase... :D

Thanks all. Figured it out, it was the enhanced star base mod. For some reason, it doesn't work with 5x and UCP. All fixed now.