BTW: If you try this fix: In your mind and on any paper plans, label the second 90% as something indispensable. Do not call it "refactoring" or anything else th

BTW: If you try this fix: In your mind and on any paper plans, label the second 90% as something indispensable. Do not call it "refactoring" or anything else that sounds like it could be done after you ship. It can't. Ask me how I know.