Long time no update... but at least I can show some progress, here:
Observe the lovely 'golden' rings for stitch markers (I kept one of the hair ties as a reminder of changing rows). Really, they're curtain rings, but strangely appropriate for this project, don't you think?
I did one modification to the pattern. To keep the lace pattern continuous, the 1st row in the elbow-to shoulder section now reads like this (right sleeve):
Row 1: CP row 10, m1 (right needle), place marker
Then of course I had to twist the 1st stitch of the 2nd row, but that's trivial. I'm now halfway to the shoulder section, which is good. Now if I only can finish this before the winter!