PJF wrote:
Pianist Pete plans persistently proper practice, perfectly polishing pretty Polish posthumous piece.

Hehe!
Beautifully interpreted and you really play this with feel. You also chose a slow tempo which I feel is right for this Nocturne. I really do not like when it is played too fast.
Hate to take the mode down in this topic but there are several reading errors or that you have taken a very liberal standpoint to this Nocturne. From what you write, you are aware of many errors but really of everything? Perhaps depending on differences in editions but well, starting from the beginning.
- Bar 1-4, you chose a different pedal setting for bar 3-4. Intentional?
- Bar 5, you use an unusual start if the trill, one note down then trilling the two notes above. Any special reason?
- Bar 7, you leave out the second high C here and I know this differs from score versions. But it is obvious in Chopin's sketch (damn where do I have it...) that it should be repeated as in the score I attach to this post.
- Bar 13. Repeat of bar 5 but here, you do not start the trill one note down. Make up your mind man

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- Bar 15. You misread this one. Something is wrong at about 12-14 notes into the run. Sounds like you play a B-flat while it should be B. Do you?
- Bar 21. 6:th note, RH. You play an A instead of a C-sharp.
- Bar 23. Something is wrong in LH.
- Bar 47. A variation of the trill. Selfinvented?
- Bar 49. Same mistake as in bar 13.
- Bar 58. Read mistake in the run (at the end of it). The run is pure C-sharp. You should have have made that 1000 times in your scale practise so it should be very easy.
- Bar 59. Not sure if you made the same mistake here again but I think not. You just slipped a bit.
- Bar 62-63. Here is something I am very interested in as I have heard exactly the same in another recording (Nico-Morin Paul on this site). You play these bars in major instead of minor. Is this really the notes in the score and if so, which score edition is it? When it comes to professional recordings, I have never heard it that way so I expect this to be wrong. Check the score which I attached.
Didn't mean to spoil the fun but I really know this piece and have played it from time to time in almost 25 years. Take the time to look at score I attach.