We need to create MEP groups and assemblies (e.g. pump skids or packaged boilers), and then connect pipes, ducts, and circuits to them.
Annoyingly, when you group elements with connectors, or pipes or ducts, the ability to connect no longer exists, so the group has to be exploded or (what really happens) not connected, so no data can pass between the system and the assembly, and if the assembly moves, it is independent of the associated pipes etc.
So, please allow the connectors to work properly in groups and assemblies. Thank you 🙂