If you have never done this before, my suggestion is to get some 4130 tubing and practice. My suggestion is to get some 1" x .035" wall tubing, and some 1 1/8" by .058" wall tubing. Cut the bigger tubing into rings. Make a couple that are 1/2" and some that are 1" long. You can go longer if you want, but start with the 1/2". Braze the rings onto the 1" tubing, pulling the filler from one edge to the other -- don't fill from both sides of the ring. The more you learn to pull filler around with heat, the better. I did this when I decided I wanted to braze lugs with bronze, and it made all the difference. And I've been brazing lugs for 40 years now. One thing that heat control will help with is cleanup. If you can move filler with heat, it's much better than using a file.