Need some help with building system

Hello! I’m trying to create a building system similar to games like Robocraft and Crossout.

I can’t find a way to connect up objects in the building mode, and I don’t know If I should use Physics constrains or attach to component. I’ve been at this now for the past three days, and can’t find a way of doing it without running into a problem. Many thanks if someone could shed some light on this :slight_smile: