I like my feeders to have a funnel & put the motor on the inside upside down with a rod going to the spinner through the funnel. This is the way feeders used to all were built before the external motor/ battery combos emerged. Call me old school, but I have had better luck with this set up to keep coons from ripping wires, cages, & solar panels off. I swear coons run around the woods with a pair of pliers & wire cutters on a destruction mission!