Here you go, Jeff, notes scribbled on the back of a daily Dilbert calendar sheet shortly before going to bed, worthy of George Lichtenberg himself.
First, sixteenth notes, topped by the motif, with the note tense, light strings.
Also: use agitato theme as the dying out end of the 1st section, then pick up violin solo, use Sonatina agitato [treatment, later,] to lead into current heavy section, after it stops, huge tenuto/pickup to total Rachmaninov.
There. Everybody happy?
So maybe I’ll have better luck tonight in getting the opening section to the double bar.