jon,

tinning is brazing. it is just a method. and there is no need to order stupid quantities. I dont know where you are at, but around here you can pic up bandsaw blade repair kits, that often come with 1oz 45% silver, and about 4 ounces of flux for under 20 bucks, and it will do you just fine. Get cad free if you can, doing a few braze ons isn't a big deal as it accumulative, but nonetheless is no good for anything with a central nervous system.