Thanks @TumeniKnobs. Totally agreed on the Rev2. I love that thing. On this track, I combined a Rev2 pad with the VC340 voices and strings, and then faded in a split signal going through an external effects pedal chain.
As far as sections and transitions, that's definitely the "work in progress" part of this track and my project as a whole. I'm just experimenting with a bunch of raw semi-unrelated parts and seeing how I can fit them together like a jigsaw puzzle. In the end, I hope to make all of the transitions more natural. I'm used to one-track, one-take improv stuff, so it will be fun to practice mixing techniques and EQing the finished collage of multiple tracks.
Good luck with your project!