double uggg!
I thought I had extra of the red/neutral triangle pieces, but it turns out I did not. I had missed some when laying out my sets. Guess I got so careful about the corner pieces that I messed up the others. And because I thought I had extras, I used more of an assortment for the corners and no longer had matching pieces. So I had to make three more to match the set I was short.
Oh well, that's why I don't put away fabric until after everything is assembled. I've got 5 more blocks to sew up, then I can start putting together the top. I've been using my border pieces as leader/enders and have two rows sewn together and working on the third.