While thinking about which summer top I should make next -- what about this one, which I've already got all the yarn for? --, I've been working away dutifully on brown butter. And I made it to the armhole decreases! Sooner than I thought actually. I'd been knitting and knitting, shooting for 40cm and when I finally got there and compared the piece to the finished back, it was too long! Thankfully one of the Knitsmiths figured out my error. The 40cm was to be measured from the cast-on edge and I'd knit the front 40cm from the ribbing. That meant that I had to rip out a few centimeters, but I didn't really lose any ground, since I'm still at the armhole decreases. So it's all good!