Ksorota upgraded some of the caps on my p20. It definitely yielded a improvement over stock.
I'm not sure which caps he used but he said, "Nichicon muse/fine golds or the Elna Silmic IIs, but also have used mundorf and audio note caps with good results."
Thanks for this, if you do not mind, can you elaborate on what happened to the timbre of the sound after this heavily done mod? Like warmer or colder, stage size, the blackness of the background, space between instruments etc.