Hyperpronation

I'm a longtime PF sufferer. I had surgery three years ago which helped for a short time. I've tried various orthodics including those from a podiatrist. Nothing seems to work. I have been seeing a Podiatrist in Cheyenne who has diagnosed hyperpronation "a structural deformity of excessive motion of the ankle boone on the heel bone. This motion is responsible for the excessive motion to the bones and the soft tissues of the foot"..in other words, flat feet. He is doing a surgery called Subtalar Arthroereisis where a "small stint is placed into the Sinus Tarsi which prevents this abnormal motion, restoring normal motion". Has anyone had this type of surgery and what were the results? www.hperpronation.com and curemms.com are two sites with more information.