A pianist
One of my greatest flaws is the ability to memorize rapidly. I have a good perception of linear elements but when it comes to harmonic progressions etc I suppose the early training was insufficient.
It's perfectly possible to play almost anything without really beeing concsious of what you play.Many pianists do so.At some point I discovered that I really didn't have a clue. And as I'm not trained to composer level (which of course is the ultimate preference) I found that this very slow practising,of course beneficial from other aspects neuromotorical kinestethic memory, is above all a good way to see what was going on in the composers mind. Many times hands separat trying to play harmonic progressions in other tonalities does wonders with technique and provide the necessary security you'll need when it's showtime.
The theory of intervals is easily accesible and a good practical knowledege enormously beneficial.
Is it really advisable to always have knuckles above wrist I mean you can perfectly well have a healthy arch below a high wrist?