Hello i think this may be my first post, so ill give some BG. Firts heard Rev. Etude when i was 18, it shook me to my core and is the reason i started playingpiano. Im now 27. I attemped it 3 months after i started and suffice to say gave up soon after i realized it wasnt going to happen
Taught myself how to play, 3 years later hit a wall, took lessons for the first time, for jazz which is mostly what i play. The only classicsl pieces i know are pathet. Sonata 8 2nd mvmt, 2 bach 2 pt inventions, couple WTC's, and his french suite 5 in G the gigue, and about the first 4-8 measures of around 20 random pieces. Classical repetoire aside i know how to get around the keys, i have studied and played jazz extensively, transcribed and learned dozens of solos, learned all scales/modes 2 hands up and down. Big deal, i know....
I need some help. My teacher way back when (anyone know Pat Pace?) told me my technique was horrible. Well, no one tought me what right techniqu was. I didnt really care and neither did he, he said it would be to hard to change what ive already done. He said my wrists were really tight and that i could never play fast. He told me if i felt tension to stop, relax, then continue. I blew this off since i was young, nieve, it slowed my learning, and i was having so much fun. Also my wrists have never hurt to this day.
Present day: started rev. Etude 3 days ago feeling theres a good chance with craploads of work and discipline i can play it. I cant sight read for jack (unless they're lead sheets) so i just go measure by meas. section by section memorizing. Im having trouble with the RH in 2nd measure. Switching from the 16th note octave G's to the 4 note chord right after. I practiced only these 2 measures for 2 hours today over and over to get the chang super quick and fluid.
1) Does anyone use the pedal to facilitate this? At trmpo it seems it would be hard to only pedsl that quick part
2) any 1 measure i practice for 2 hrs i should have down cold. Its better, however i still flub the last chord occasionly. Since im switching so fast sometimes my hand is in slight the wrong place, or i nip a note next to my 2nd and 3 fingers. Or the high D doesnt get depressed with the same force ad the other notes. I see videos of people and the transition is efforyless, and they even take thier hands away from the keys between these 2 quick chords. HOW? And please dont say practice, i tried it for 2 hours and cnt get it fluid or crisp. Also after this practice, my RH wrist bothered me mildly, leading me to think its a technique thing i dont have or know about
3) the downward runs are very easy to me and dont bother my wrists, and im confident i can work those up to speed. However, i worked on the LH arpeggios in the first 2 measures of the 2nd section, and my left wrist was aching slightly after some time.
So...... How do the wrist issues get resolved, what do i do for technique for the RH chords and for my wrists?

Sorry for the rant, i dont have a teacher so i have no ine to ask about this. Please do not say 'try an easier piece first work your way up'. No, i won't. This is what im going to learn. Ive waited 9 years till i felt i may be able to play it. If you tell me theres no way i can learn it until i alter my technique, then please tell me how; this is what im most afraid of, something with my technique getting in the way of me learning the piece that moved me to learn piano. I really appreciate your help and comments, thank you.