I decided to try my hand at some basic mods by increasing the global values for ship hull mass and logistics to make things a bit less restrictive. I found a post about editing this game file:

C:\Steam\steamapps\common\Galactic Civilizations III\data\Game\ShipHullStatDefs.xml

Then that should result in making a copy of the file here:

D:\My Documents\Documents\My Games\GalCiv3\Mods\Game\ShipHullStatDefs.xml

or here:

D:\My Documents\Documents\My Games\GC3Crusade\Mods\Game\ShipHullStatDefs.xml

No effect in new or loaded games.

All I did was triple hull mass values (<EffectType>MassCap</EffectType>) from <Value>25</Value> to <Value>75</Value> for tiny hulls for example.

Suggestions please?