Good stuff. This is one thing that has frustrated me since starting guitar. I pretty much know the notes on the E strings, and A string, as those two lower strings are often where the chord roots. But the rest is tough for me to learn. It is one thing that frustrates me as compared to piano. Learn center C and you have it on a piano. All laid out in black and white. I suppose there is a mathematic pattern that I should also figure out on guitar. But this memorization tool is probably as good an approach as anything.