This is what I did yesterday. In total, it was about 6 hours of work. This is my first project in stainless steel and I was a bit nervous after having read of the problems others have had. I'm releived to say that it wasn't as bad as I expected. I did shatter two carbide inserts threading the external threads. However, the trick seems to be to take very light cuts.
The brazed in tubes are new to me also. The braze material is a Silver with Nickel alloy from McMaster. Torch brazing them wasn't much harder than pipe soldering although you do have to be carefull about burning the flux.