Funny - cos I’m not a big fan!! I can see it has some uses but my opinion is that many times students spend too much time thinking about things like the Co5 when they should play more and worry less… but it certainly works for some people, and if it works for you then enjoy it!
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We need to have a chat about that haha!!
Or, you could always read my Circle of Fifths topic if you have a spare moment. 
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