Nice looking splitter Alan. Its kind of nice to work with other material from time to time, but also challenging. It's also nice to be able to make, fabricate or machine your own tools, or at least make your existing tooling better.
You are absolutely right that you can use your bandsaw to cut aluminum. In fact you can also cut brass with it to, and you don't need any special blade. You get better results cutting soft metal with a special purpose blades when using tablesaws, Radial Arm Saws or Crosscut Saws naturally, but they will still cut it.
Its kind of neat where I work. I am a machinist by trade, but its building super yachts so I get to marry steel and wood together. Mostly Stainless Steel though, some aluminum and a bit or brass. My current job is to put a 1/2 by 1/8 inch piece of stainless steel trim around a groove milled into the edge of all the granite countetops, circular stairs, cabinets and coffee table. With over 300 feet in all, with all the inside joints being coped by using files as its too tight a radious to do on my milling machine. Its quite the job and is scheduled to take me the next 4 months to complete! I am looking forward to it though.