Wow, that would be nice to have at home. We have a mill at work but as I am the boss I try not to use the shop at work too often else everyone would want to use it.I don't know how to silver solder but I do have a cheapo HF milling machine with a rotary table.
That would definitely be one way of doing it.Thought I could start with say 1/4 inch thick aluminum stock and machine a lip on it.
Silver soldering is relatively easy. Clean joint, apply flux, heat (I use a MAP torch) touch solder on joint, done. Most people try to apply the solder before the joint is hot enough. It produces a surprisingly strong join, much stronger than lead solder but not as strong as brazing.