One of the methods is the 'matchstick' method.<br><br>You pull the tubes (loop) through the hole and secure it with a 'matchstick' or similar at the other side. Works very well for TTF shooter.<br><br>You need to pull the tubes with a string so they are streched while pulling them through. That's why the hole need to be smaller than the OD of the tubes you use. This method works for square tubing as well. <br><br>Another one would be that you pull the loop through the hole and fold it over the forks to secure it.