I'm currently working on this sonata alongside with that old Rach-Bach (my memory card in the recorder has no more free space since it is filled with all the unsatisfying takes of that set... :x and I can't be bothered with deleting the files or replacing it with another memory card...). I have borrowed two editions (Henle and WUE) from the library and have problem with bar 39 and 41/42 on the second mvt. (1) The D with trill sign (RH) on bar 39: Henle has a flat in "()" on the trill sign (which means E flat), but WUE has nothing. When you play it after WUE, you get a strange sound. The famous performers on YT and on CDs play it either after Henle or with C sharp (and E natural; Arrau does this). (2) The D' with trill sign (RH) on bar 41/42: Both editions has added nothing on that trill sign, but many performers play it with C sharp and so does it sound good. Can anybody help me to find the right way?