The toccata is now "one-third done," with the understanding that when the other two-thirds are "done" I may well tweak, prune, and re-write. Because, dadgummit, I want that conclusion (after what I think has become a cumulatively powerful passacaglia) not to embarrass at all what has sounded before.
That "one-third done" is, BTW, in the Sibelius file. I was working on "the middle third" on the train ride earlier today. The "thirds" are not equal . . . I've decided I want to write 51 measures of music, and the scheme is A1 - B1 - A2 - B2 - A3 - B3, where the two players have completely independent parts in the A sections, and are in unison for the B sections. The A sections are successively briefer, and the (shorter) B sections are successively longer; so that the plan is 16mm. - 2mm. - 14mm. - 3mm. - 12mm. - 4mm.
The asymmetric periods of the violin's patterns through the course of the toccata, too, change, ratcheting a bit quicker through the successive A sections.