Oh, I'm having trouble. Here's my picture.

I'm having trouble sewing the arc to the top and bottom piece. It's a Judy Neimeyer pattern.
I've made it to the border. Have all the arcs done. But the sewing of the arc to the top and bottom piece is leaving me with a tuck or a pinch in the fabric. Yes, I've done arcs before. Can't remember how I did it successful.