A Battle of Wits

The squirrels and I are having a battle of wits. I have a pecan tree in the yard with lots of pecans each year, but it's amazing how many the squirrels can carry off. So I've wrapped the base of the trunk with aluminum flashing hoping their little claws can't hold on to climb the tree. Several fence posts are near the overhang of the tree so I nailed pie tins (upside down) to each post so they couldn't climb and jump into the tree from the posts. I then sprayed silicone spray on the flashing and pans to make it slick. If a squirrel gets up that tree I want to watch him to see how he does it. It's really aggravating to see the fruit and nuts carted off by various animals around here.