Test fit before I mix up a large portion of the JB Weld. One thing to note, before forcing the JB Weld into each tube, I cut two balsa plugs that fit inside each tube. They were pushed into each tube with the bracket for that tube. The purpose of the balsa plug is to capture the JB Weld and prevent it from moving down in the tube. The viscosity of the JB Weld is so thick, I don't think it will move, but it's good insurance.