I'd suggest that you consider getting more comfy with bronze before trying silver. Why? because you need to get better with something, bronze is FAR lower cost, it's stronger if the gaps are large of the joint is less then well cleaned, You'll want to use it for some joints even if you are silvering all that you can and more reasons. I find it harder to flow braze with brass because of the higher temp, when i go to silver there still is a remembering curve but less then th other way around IME. I second Eric's advice of tube sleeves as practice. i have 4 cut and ready for prepping in a box I'm taking to a friend for when i help him paint my recent frame. He's also going to give me a brazing tune up. Andy.