Excellent Ironman!

I've wanted to braze with propane/air for awhile now, but wasn't sure it was possible. I hadn't tried compressed air, though, just an atmospheric burner. With the burner I built, I still needed a hearth to get enough of the flame localized on the metal -- otherwise it was too diffuse.
So I have questions about the details of your torch.
1.) Have you tried brazing with it?
2.) Is your torch an actual copy of the torch in the magazine article?
3.) What magazine was it? What issue?
4.) If it isn't a copy of the torch in the magazine, can you give the details of the tip -- dimensions etc. so I could build one?
5.) Is it just a simple cylinder, or are there mixers or ports inside?
Great work!

The flame certainly looks concentrated enough to braze, by comparison with the usual atmospheric propane burner.