FYI...One way to use 56% on a seat stay and ensure a strong joint, is to "ring" braze it. Which is to say that once you have everything mitered and prepped and are ready to fit up, you can flip the frame upside down and slip a coiled up section of silver into the seat stay (after its all fluxed up, of course, inside and outside). See the photos below.....which, BTW, are for illustration purposes and the stay has not been mitered or fit to the seat tube. Once its all set up and flipped up so that gravity is holding the ring of silver against the seat tube/tip of the seat stay, carefully heat around the joint area until silver just starts to flow out all around the joint. This type of brazing is fairly simple and leaves you with a nice thick fillet of filler on the inside of the say, making for a strong joint, with minimal clean up on the outside. It's easier than trying to fillet on the outside with silver, which, as unterhousen said, can be difficult, especially if you've never done it before. I also like how fast back seat stays look when they have minimal to no fillets on the outside : http://www.andersoncustombicycles.co.../DSCN4308.html

Dave