Working well for me so far. Bought some 20" wide roof flashing from Home Depot. Cut 18" lengths and wrapped them around the legs shaped as cones. Secure them with self tapping screws and you're good to go.
Two thumbs up on this one. Dang coons are out of control in Kansas where I hunt. We rarely use timed feeders in Kansas but I have fed many coons in Texas as well. I have heard that Purina Monkey Chow will make the coons go away as well. Great Idea!!!
Another idea, and I have actually seen this sold foir this purpose but you can make yourself. Cut three pieces of 4" PVC about 18" long. Cut three pieces of "dog chain" (length to be determined) and attach one end to the end of each piece of PVC. Slip one piece onto each feeder leg with the chain up. Attach the other end of the chain to the bottom of the feeder barrel with a self tapping screw so that the bottom of the PVC hangs below the bottom of the spinner motor. When a coon climbs your feeder leg and gets to the PVC, they will try to continue on over the PVC. Because the PVC is hanging loose it will flop around and they will fall off.