This is a tip from Kevin Matthews, CO at Advanced Orthopedic Designs. He found some threaded ball knobs in the MSC catalog and attached them to threaded rod. The rod fits perfectly in the pipe that they use to pour orthoses. He has a few different sizes that he can use and they are perfect for a consistent shape heat relief in any thermoplastic device.
A homemade device for heating and relieving pressure areas on AFO’s, SMO’s, and thermoplastic prostheses