All Chopin,
When you say that you went "through all the notes and memorized them" what do you mean exactly ? Do you follow a method to do that ?
What I find the more complex is to have an accurate left hand with no hesitation or sudden and random "black holes". I try in that piece (after having identified the reapeating LH sequences):
. to use the fingering pattern 5/52/421 as often as
possible (to me, it brings even more confusion if you
multiply the number of different fingerings...). Note
that the finger 2 press twice the same key playing a
kind of role of pivot... don't get me wrong: I do no
compromise with what the genious wrote !! but so far,
I have only one chord that I cannot play with 52 and
that I play with 51 (GF measure 3)...
. memorize the quality of chords that are played
(progression)
. memorize the single key that is played by the finger 5
and then the first key of the first chord that is played
by that same finger (to help here I play sometimes
only the 5/52 sequence, skipping the 421 chord)
. for the 421 chord I more or less successfuly rely on
eyes, ears and hand memory...
I currently work on the first LH sequence (first four measures) very slowly (60) and I play the right hand over it from time to time. I also work on difficult RH passages of the four next measures to anticipate (also I do my best to avoid to look at my right hand so that my eyes can focus on the left one...)
Now I have no idea wether that is a consistent - and above all an efficient - method or not but at least it seems a little organized to me

Would it be valuable, in addition to that, to try to write the trebble key staff from memory, to memorize all chords in their root, 1st, 2nd... inversions, or to do any other exercise that you would suggest ?...
Don't know what the result of all that is gonna be but I would like so much to be able to play - as well as I possibly can - that wonderful piece !!
We had a fantastic poet/composer/interpret/etc. here in France - actually he was coming from Belgium and his name was Jacques Brel - who used to say "I am certain that talent does not exist ! What exists is the willing to do something ! The rest is a matter of riguor and sweat !".
God ! I want to do it, I try to be rigorous and I swear that I do sweat... but I still have no talent !

So if someone can bring his stone - or throw it to me because I am completely wrong - I would really appreciate !
Thanks to all in advance !
Drooxy