A contrarian view: 14000 lines of working code is no joke. Why bother refactoring? If you don't understand it, keep trying. To add new functionality simply write new subroutines that follow the conventions of the original code. Fragmenting the code may make it even harder to understand and maintain. Perl makes delicious and potent spaghetti, just add more sauce, and enjoy. K.I.S.S.
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