When I export a rig with mirror behaviour L and R turned on (using control_01ās) and then import and connect in a fresh scene, two rigs are built (one seems to be saved to the model file) but when I am working with a full character this distorts geo and destroys the character. I also noticed that when I duplicate symmetrically, the R side that is made then has double transforms from the root controller.
I was wondering how to add the mirror L and R functionality so that I can use the game tools to export a rig and model file that is not broken, without having to go into the model file and deleting rig information