"We haven't seen a mole around MOM's yard in years now."

What more proof do you want? Geez! My advice is, keep those spinners right where they are. You'd be up to your eyeballs in moles by now if you hadn't installed those spinners.

I have a friend who wears elephant repellant for much the same reason. He heard that elephants sometimes will run amok and trample people, so he is prepared at all times. It has worked magnificently. He hasn't seen an elephant once in the last 10 years.