Hi pWn3d1337, Techguns mod is a masterpiece, thanks for creating it.

Ok so lets go to business.

According to the description of the LostCities mod: "The Lost Cities is a mod that allows the player to play in an old abandoned city instead of the normal world" https://www.curseforge.com/minecraft/mc-mods/the-lost-cities

Imagine a complete integration between The Lost Cities and Techguns mod. It would be incredible to see all the structures articulating in a big city layout. This scenario could boost both mods, increasing their visibility in the modding scenario.

I believe that the decimation mod in 1.7.10 (biggest zombie apocalypse mod), now discontinued, will leave a gap in the zombie apocalypse genre in minecraft, and TechGuns and the mod Lost Cities could fill that gap easily.

This API may help -- https://github.com/McJtyMods/LostCities/tree/1.12/src/main/java/mcjty/lostcities/api

For custom structures in LostCities you can use LostCities configuration
The problem is that tech guns structures spawn on top of buildings. So devs should probably check if there's structure already in certain chunk before spawning their own structure (either with vanilla methods or LostCities API)