I buckled down and zoomed through several inches on mom's vest. I now have everything from the bottom to the split for the underarms in one fuzzy, variegated rectangle. Like I said before, I've been following a diagram she gave me, measured from an existing vest. But at the armholes, the math goes funny. It's much wider around at the bottom, and then it suddenly loses about ten inches, right where the armholes come in. And armholes aren't normally five inches wide, right? Anyway, progress has stopped until we can re-measure.
Meanwhile, because that knitting energy has to go somewhere, I picked up butterfly again. I was farther along when I stopped than I thought I was, so it really wasn't much work. I finished the body today, and now all I have left is the trim around the top edges and the straps. And blocking, of course. Of course. Pictures soon.