I use silver solder on ribs and lumps, I use the hard type for making band saw blades. Simply file tapers on the end of the blade, using c clamps I align and spring load the ends, slip in a piece of silver solder and borax flux and heat with my propane torch. Same name but a much different product. By the way the small amount of metal in the blade allows a common torch, after cleaning I like to give the joint a quick temper, blade last much longer.

bill