Fantastic Sir ! I got the Kirk Lorange slide rule from Australia in the 1980s and have used it ever since. This is a completely superior level (I have ordered one). Us ‘teach ourself’ types have spent years barking up the wrong or the same trees. I taught myself bass over years and focussed on scales and had no idea about modes or pentatonics! I even written and recorded many songs and played in many bands but it would have been nice to know this and something about chord progressions for jazz and funk and whatever. I did kart racing in the 1980s and it was like a secret society – no one would share any set up info and all before the Internet so I reckon it was same with music. Thx vm from Poole, England 🙂 🙂
Hugh Davison