If it works, but you have nothing else to do, what I would recommend is starting a comprehensive test suite. Then you can refactor at will and have instant knowledge of whether or not your changes broke things. For any system of significant size, trying to make sweeping changes without a test suite is a recipe for disaster. You wind up testing everything by hand and you will miss something. Of course, you'll miss things with a test suite, too, but then you write a new test for what you missed and continue on your way :)
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