I couldn’t really find another post about this, so I thought I would throw it out here.
Personally, I really fancy Cdda for all the things you can build, but I’ve always missed one thing in particular, while it’s not so bad on the normal Z-level (or whatever, above ground, anyway) in LMOE shelters it is especially painstaking for me.
Electrical installations, that do not have the mobility of vehicles, but can instead go down staircases for instance.
Power utlities, such as light, heat, entertainment and defenses would make a wonderful addition, especially just light and power, fed by an above-ground series of solar panels, in a LMOE shelter, with other power sources such as generators run by any of the engines you can find, coupling it up to an idling vehicle, building primitive windmills or watermills by rivers.
It’s really just an idea for now, don’t know what else could be done about it