Having searched for this myself ( after someone I know also asked about this) I fear I might be lost. It has been a while since I double checked but I think the only publicly available archived copy is to be found in Berlin. ( that is if it was not destroyed and lost in the Great War ... )https://musikipac.staatsbibliothek-berlin.de/ipac_musik/catalog/main?cn=S&lin=S5650035&rin=S5650098&ro=1&css=11&cop=:osy
his piano sonata is gg tho, and someone please transcribe his psalm sonata for piano.
I know of at least one transcription that already exists. Some parts do seem a bit heavy handed though. I'd be more inclined to learn the organ version.
"doesnt look to hard"sh*t you must be a beastYou better post a recording when youre done.