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@Mikenetic
I've got a few questions about that joint, hopefully you'll be able to answer. Hopefully I don't sound like too much of an arse either!
It looks to me like the braze hasn't been pulled all the way through from the exterior tube/lug interface to inside the lug, nor has it been pulled all the way around the exterior edge of the lug. In other words, it looks like you may have a poorly penetrated joint, at least in the pictures.
Now, that might be the photos, but it'd really be worth checking that - you should see the bronze everywhere that it can be pulled via capillary/heat action. Obviously the danger is that if there are gaps, the joint isn't going to be as strong as it could be. Is the joint complete, or is there more work to be done?
Have you done a practice one and cut it open to see how the brazing material has flowed inside the joint? That's well worth doing.