wv - :-)
I'm going to step on the "thin ice" of memory on this one. I think that the most pragmatic rib atach method is pure tin. It is very corrosion resistant when used to coat the barrel area inside the ribs, is relatively durable in soldering steel to steel, and has a thermal expansion coefficient that closely matches steel (little stress is induced as the barrels heat and cool). In the event of a joint failure, tin is relatively easy to repair. Brazing metals (brasses and silver solders) are stronger, but more difficult to work and much harder to repair. I seem to recall also that their thermal expansion coefficients are not as close a match to steel as is tin, somewhat negating their higher strength. Soft solders (lead and tin mixes) are easier to work, but have less strength.
