Finished. With almost no yarn to spare (I even dipped into my swatch), on time for Rhinebeck.
It is fantastic. The fit is good, though I confess I would like it a bit looser (maybe Maxfield 2?) and the overall look is super.
If you look really closely at the middle of the collar you can see where I cheated a bit to save on the blue yarn. Instead of working two rows of each colour, I worked four of the varigated for about 6 stripes. I can't see it and I bet you didn't notice in the colourful trippy haze. Buy a bit extra if you make this sweater (or really any sweater).
The yarn, Indigodragonfly Polwarth Silk is divine. I love this stuff. It's so soft after washing. The colours are perfect: Kathleen Turner Overdrive (navy) and Paging Dr. Smartass (which is a colourway named for me).
This pattern using varigated yarns perfectly. I even got to show it to Amy Christoffers at Rhinebeck (though I was too silly to remember to take a photo).
All the details are on my Ravelry page.