Magnetic Holder for Liftmaster Garage Door Opener

I wanted a holder for my liftmaster garage door opener - the kind you buy at the hardware store to replace the one you lost.  I wanted it to be magnetic so it would stay put in my golf cart, so I made it to hold two neo magnets (3mm thick, ~8.2mm diameter), and printed it from TPU.  I added a ridge on the rear to go into the slot where I had taken off the metal clip, which annoyed me.