As a basic precaution, I use pin together all all materials that a glue will not bond together like hard plastic with polystyrene cement as the active agent.
Super glue is in my opinion not robust enough on its own to use to glue plastic to metal, resin to metal or metal to metal components together on their own.
For instance with the simple head swap in these images, I have drilled a hole in each component so that I can insert a cut piece of a paper clip, held in place by green-stuff (2 part epoxy modelling putty). I use a tiny amount of super glue as an instant way of securing the two pieces in place. The end result is a secure fix.
