A senior parachute rigger received this harness and container for some work, and when he closed the rig following the repairs, he discovered that the main closing loop was more than two inches too long. The main closing pin had no tension on it at all in this configuration. He shortened the loop to the correct length and helped the owner of the rig understand why it is essential for everyone in the airplane and on the skydive to have the proper tension on the closing pin to prevent an inadvertent container opening.