Ding. Ding. I am ready to declare a winner M&L. Just three improvements. Use finishing nail, longer plastic strap, and use needle nose to grab it so can cut plastic away before putting it in place. Oh, and thread strap into clinching device before you start. Needle nose idea from slapper makes it real easy.
And if yo ever buy a spring be sure to keep the metal thingee that holds the spring. you can use it instead of the strap.