Andante Spiniata chopin fingering advice

[aragonaise]

Hi all,

I need some advice from yall on the optimum fingering for andande spianata at the end of the minor key modulation, when the RH cascades down in a series of semiquaver pair-notes.
B-D#
F#-B
D#-F#
B-D#...
and so on...

I need to go at speed, and can't seem to figure out how best to utilise my fifth finger in this.



 

[bench warmer]

Here's the fingering I had penciled in for me for the first  4 pairs: 2-4, 1-5, 2-3, 1-4, 1-5. It's different than what's printed on my edition. Keep experimenting till you get comfortable.