Here's a video I made about this. <iframe width="560" height="315" src=" https://www.youtube.com/embed/aBHnZuC98CM" frameborder="0" allowfullscreen></iframe> Bill Lifford -- *William Lifford, CP* *American Board Certified Prosthetist* *Progressive O&P, Inc.* 1111 Willis Avenue Albertson, NY 11784 516-338-8585