I just ordered some tubing to start building racks and I ordered a bit of stainless to try out. I know I need silver brazing rod, but I don't know exactly what I need. I read that it needs to have nickel in it to stop the stainless from corroding. I also read I can use nickel brazing rod without silver in it for stainless, but it has a much higher melting temperature. What would work better for small fillets, and where's the bet place to buy it from?