Several mods have incorrect +3 complexity values. I belive they are drum-loaded, radio-powered, and displacer.
https://wiki.cavesofqud.com/index.php?title=Special%3ACargoQuery&tables=Mods%2C+&fields=Mods.DisplayName%2C+Mods.Difficulty%2C+Mods.Complexity%2C+&where=Mods.Complexity%3E2&join_on=&group_by=&having=&order_by%5B0%5D=&order_by_options%5B0%5D=ASC&limit=&offset=&format=
Jojoknob (talk)