this is my best shot at 12:41 pm
Very good , i shall try to make some helpful comments.
1- I cant help but emagin the fast runs in the RH and LH hand being played by string insruments, so basically violin ,viola and chello.
2' So unlike some of his other etudes, where the individual notes are of little importance on their own, with this etude the independance of a single note ( semi quaver) and its relation to the next note is very important to creat the electric effect.
3- The staccato quavers are staccato for a very good reason, that reason is to keep the music on edge ,to make it sound live. So emagin the string section in a orchestra playing this,not plucked but the dramatic orchestral effect.
4- Looking throgh the score we can see that their is no real melody, i would bring out the semi quaver more.
5- Bar 4 ,the octave semi quavers, i feel to avoid making the sound like octave chords, you could bring out the top notes more, so less force with you thumb, and more with the littel finger(5).
6- The climax for me is on the last page, the music starts on ( p ) then reaches FFF, this section i feel should generaly sound more in your face . I feel the Coda no longer demand Note clarity , you can use a lot of pedal here, because we are looking for the overall effect.
You obviously can play this very demanding etude, i hope some of those points i made make sense.Ciao.