It might be possible that you’re not allowed to do this on your own as a pilot of a certified plane (and require to pay someone who is certified to do so) but I

It might be possible that you’re not allowed to do this on your own as a pilot of a certified plane (and require to pay someone who is certified to do so) but I can change mine very easily from a setup screen in about 30 seconds. It could be a procedural thing where after switching, the FAA won’t recognise your canonical one? That’s seems a little strange, though.