At any rate, here's progress to date:
This represents about half of my yarn (or 500 yards). I do believe I'll make it with the 1000 yards I purchased. After working the expanded triangles (from the base of the sweater - or under bust bodice), one reconnects them in the round and then knits the yoke.
It's just fucking endless, all of this K1P1.
Here's a stock pic of the finished sweater for reference:
Do you see how the bodice widens into the armholes? Well that's the part I'm knitting right now. You can see how the slender, tall model is wearing a version without waist shaping. As you can tell, from my photo above, I've given the bodice an hourglass shape. We're destined to see if that's a good or bad idea.
Of course, it could be a massive hit - but I'm not inclined to get overly optimistic just yet.