For the love of God guy's doesn't anybody own a drill and drill bit? Drill the head off the screw "15 seconds", pull the cap, make repairs, install cap and thread a new mounting screw/bolt.
I wasted 10 minutes trying to get mine out. After drilling it I had mine fixed and back together in 15 minutes or less.
Food for thought.
It won't be greed which destroys America. It will be envy.
Man who runs in front of motorcycle gets tired. Man who runs behind motorcycle gets exhausted.