Hey Corporal, these units are my first serious rail builds and are not as advanced as my later units. The only current multiple units i have made with functional multiple working is the BR Class 334 V2. Those can be coupled together to form a fully functional and in sync 6 car unit. A link to these electric multiple units can be found here:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2685818513

Sorry for those wishing to make 4 or 6 car sets! The Class 334 V1 and the class 220 also do not have multiple working right now

Can these work in multiple units? (I.E 2 sets coupled)

Hey Cc8tv thanks for the nice words about the unit. If you are looking for a better painted train I recommend you check out CaptainGears fictional class 158 livery. It’s much better than mine and has a nicely detailed interior. Here is the link: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2577591591

nice design looks like the real thing (without the paintwork but eh)