The short answer is “today.” But out of curiosity, when you say that you’re still referring to it, what do you mean? Are you looking at it to see why/how things don’t sound right when the finger lands incorrectly? Are you using it to remember pitch names? Either way, I still think you should rip off the proverbial band-aid. After seven years, I really think you know where things belong. The real issue now that it’s coming off (I believe in you!) is exercising your ears to recognize what’s going on when you realize something’s off. Your ear should be your sharpest tool when playing – not your eyes.