Visit Pelagos, an insular planet of coconuts. Use calciners to refine resources, and cargo ships as the perfect way to connect its scattered shores
Mods introducing new content into the game.
New places to build more factories.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
New ways to deal with enemies, be it attack or defense.
Changes to enemies or entirely new enemies to deal with.
Map generation and terrain modification.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Related to roboports and logistic robots.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.
More than just chests.
castra, cubium and all-planet-pack-tweaks seem to depend on casting-engine-unit, at least upgrading Pelagos from 0.27.4 produces an error:
Failed to load mods: Error in assignID: recipe with name 'casting-engine-unit' does not exist.
Source: engine-productivity (technology).
Not sure if this can be fixed here, but I will defer upgrading Pelagos for now.
I do not added engine productivity for castra and cubium. That is probably caused by some other mod that does that.