Well, it doesn't HAVE to be hours spent on editing.. some simple stuff like this can be just a few minutes. And 'perfect'? NOBODY gets that! All we can shoot for is just a little bit better...

If each time is just a little bit better, sooner or later somebody (but not ourselves, if we are being realistic ) WILL call it perfect!
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An arranger is just a tool. What matters is what you build with it..!