I really really wish this was saveable, so i could save my cool technicals.
In case it's a bug (i really hope it is), duplicator just has a small cube wireframe, and spawns nothing, and adv. duplicator says "invalid head entity" sometimes, and always spawns just the 1 gun, the gun part floats and the base falls down.

I really really hope this gets fixed/implemented. 🙏🙏