I was so close to just posting the original assignment from last semester, which I didn't want to do, because I knew I could do better than that, but I could not for the life of me remember how I'd done it!
Folks, this is why you should practice rather than getting it done once and calling it good.
I kept plugging away and, by Jove, I do believe I've got it!! I cleaned up the drawings from last time, so they look a lot better, in my opinion. I'd been almost there without rereading everything, but there was this one little spot that was tripping me up. I think I need to make myself a little index card with the steps on it and then just sit here and do a bunch of these until I have it fully memorized.