OH, and Point 1... You are kidding the audience that a full band is inside your arranger? It's not exactly stretching them to say the vocalists are in there too!

That's kind of the whole thing about OMB's. Nobody thinks for one minute you are doing it all by yourself... The hard part is convincing them you are doing anything at all!
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An arranger is just a tool. What matters is what you build with it..!