I don't know, I feel like I am playing those with my fingers. Like how are you going to succeed getting the keys down without individual finger movements? That doesn't mean you should use tense finger movements or hold your arm rigidly stiff as you move your fingers.
Try this:
In bar 24, first play the figure just with the bottom part, so it all becomes a figure with single notes only, meaning f-doublesharp, d#, f-doublesharp, a#. And do this for each figure in the bar. Move smoothly and make sure you are relaxed and supple. Then, play it just with the upper part, meaning a#, d#, a#, a#, in the same way, still single notes.
Then combine these two, so the technique for playing the figure with double notes remains more or less "the same". It should feel fundamentally the same as playing it with single notes, it's just that sometimes you use two fingers at a time instead of one. But don't forget that your arm and wrist need to be supple and you need to move smoothly regardless if you are playing single or double notes, or mixes of the two. You might need to do this slowly and patiently for a while, to develop the coordination needed.
Hope that helps. Let me know if you have any questions.