Here's the corset with all the panels assembled and boning channels sewn, with temporary zip-tie boning:
The next step was to cut and tip the spiral steel bones:
The corset is now fully boned except for one piece of spiral, since I ran out of boning tips. I also need to order flat steels for the back next to the grommets because I forgot that in my original order. After completing the boning, the next step is to bind the edges and floss the bones (embroidery that keeps them from shifting around in the channel).