I was listening to European Son a few minuts ago ( the alternate version aka the complete version as I like to call it) and I've noticed some organ/keyboard notes from 4:48 to at round 6:00, you can heard it better at 5.30 when it gets "quieter", use your headphones to hear it better, it's like a single note in the background, you can also hear it doing a few notes at almost 6th minute before stopping.
Do you also hear it? Or am'I just dreaming?
Who do you think played that note? John? Lou? Or someone else?
Let me know!