How to make tapered tubes for slingshot

This is how I make tapered tubes for slingshot. It might be that this method is known to you, but I haven´t seen it anywere else myself. As you all probably know, tapered bands and tubes are a lot faster and powerful than straight ones. Bands are easy enough to fix yourself, but tubes are a bit tricky. Hope you find this idea useful. You will also see my way of getting a steel ball into the end of the tube. Some prefer other ways of securing the tubes into the caty, but I´ve never had any faliure/accident with the steel balls falling out of the tube. TAKE CARE, though! I don´t have any chrony results for these tubes (yet), but I´ll try to get back to those in the future.