@Sprouto Hm, I'll have to double-check with my brothers. But I think it's unlikely: all mods are put into one zip file, uploaded to Google Drive, then downloaded, and unzipped into the same \mods folder. If my mod is placed wrong, then all of them should be. Furthermore, the desync hits so quickly we barely have time to give our first orders. We do usually play with the pre-built option activated, but the only extra units it gives you are some T1 mass extractors, some T1 power generators, and a T1 land factory—none of which my mod alters.
Okay, stupid question: I thought only the person hosting the game could turn a mod on or off, and as long as the other players had the same mod in the correct folder, it would work fine? Do the other players need to turn a mod on?