Hi all,
Isn't it a pain the way Beethoven takes a grade 8 piece and throws in a grade 39 passage?
With my relatively small hands, I had the same trouble with this passage. What you might try is, to think about the bass notes on the beat being the ones that carry you along, and play them by themselves with the 5th finger. Then put the other notes in at a slow tempo, concentrating on getting from the 4th sixteenth note back down to the next bass note. That F# in the first passage is the worst because of the awkwardness of getting the thumb up to it. The wrist just does not pivot that way! I don't know of any great way to ease it, just steady slow practice, and maybe try it with dotted rhythms, etc.
Good luck! It's a lovely piece.
Teresa