Second this. The temptation to rewrite from scratch is to be avoided; the code is going to be a mass of edge-cases, and you can't spot them all at once. Rewriti

Second this. The temptation to rewrite from scratch is to be avoided; the code is going to be a mass of edge-cases, and you can't spot them all at once. Rewriting will take just as long as refactoring and introduce new bugs instead of killing old ones.