Cut a hole in the the bottom of a 5-gal pail that matches the size of the feeder's slinger-port. Align the bucket's new hole over the feed-slinger hole and attach the bucket to the feeder with a dozen sheet-metal screws bored through the remaining OUTER PERIMETER of the pail's bottom (using fender-washers help a lot). Mounted in this manner, the bucket's wide mouth shouldn't affect the slinger's pattern.
Coons trying to access the feed-slinger hole invariably fall off of the bucket's curved-horizontal surface. Works extra-better if the feeder is stationed over water (mounted on a dock) with the bucket's mouth extending out over the water; since the coons fall completely off of the dock and into the water. Grease applied to the bucket's upper/outer surface makes the coons' attempts even more comical. After a few times, they give up - or, keep falling off if they're really stubborn.
BTW: Running the screws around the pail-bottom's perimeter and through fender-washers helps to keep the screw-heads from pulling through the pail's plastic bottom under the weight of a heavy coon.
