To date, only one individual has been kind enough to share his experiences. Here is what John Kelly says about what happened when he place a feeder in his yard following the rule, “I have a feeder that met all of those criteria, but squirrels didn’t have any problem dropping 10 feet from an overhanging limb and landing on the feeder. They could easily grab onto the rough wood top. So, I covered the top with smooth metal, painted it with slippery paint, and waxed it. It was hilarious to watch them hit the top and slide right off.”
After 50 years of experimenting with bird feeders, I have found that squirrels can achieve the improbable. Mine are now 5-12-12. The squirrels have jumped farther, but with a metal lid they keep going off the top.