Sometimes a symetrical model gets a little screwed up and asymmetrical. A feature where we could select half the model to keep, and delete the bad half and than duplicate and mirror the good half would be very useful.
It’s already there.
Go to symmetry menu.
Now select “left to right” or “right to left” depending what you need.
I just made a quick test and it seems to be screen dependent super easy, as so often in Nomad.