I have installed a metal clothes line in my yard - twice - each time using concrete for the footings. My probelm is that a good gust of wind will tilt the uprights because of the sandy soil. I could even pull the poles, concrete and all, out of the ground. I heard about a product - I think called "Big Foot" that may help. Any ideas on how I can remedy this to keep the darn poles straight and taught with blankets on them?