I'm tired of having the squirrel's hog the seed from my pole feeders. They can climb the pole to the feeder with no trouble. I've looked at the inexpensive cone guards ($10–$15) on eBay, but they seem to have a seem or laces that are used to put the cone on the pole that would defeat the purpose of the cone by giving the squirrel something to grab onto and prevent him from sliding off the cone. See the attached photographs of a couple of these guards. Do these work? If not, is there an inexpensive cone that I could purchase that does work?