Here's a strut tube pouch my wife and I made. I designed, measured and cut -- she sewed. it's made of canvas with a bungee that has a cord stop on it, plus I use a buckle-style Velcro strap around it farther down. The top flap is longer than necessary, but that was the length of the fabric so we just left it alone. If it botherrs me too much I can always cut it down and re-hem.