I had mentioned that I made the velocity stack on the new .65 and here you see how I did it. The 1/4" drive 3/16" socket is a snug fit into the 9mm OD H&S tube and that's good so the socket can't wobble around and make the flair lopsided. The O-ring makes it require some pressure to push the clip up onto the carb. All this one needs is for the other end to be flaired. It's just a piece of scrap though. The brass tube ones are better looking, I think.I use 9.5mm tube for the 1.00 and 1.25 Saito's