The first and easiest option, which happens to be our favorite, is the Zip Quick Ratchet Installation. This system makes tightening the cable easier than ever and simplifies the installation so much that you could even do it alone! Additionally, in order to tighten the zipline with ease and success, set up the turnbuckle, sling cable end first, attach the U-Clamps to the loop on the opposite tree (make that loop as tight as you can), then use the turnbuckle to tighten even more.