Then begin at the central area to add filler quilting. I am not a feather quilter queen(yet) but did figure out how to use unstructured feathers to cover open space.
I then work my way around the piece adding filler stitching where I think it's helpful.
Even some stitching within outlined tissue elements (upside down because the first photo of it above is also )
Lots of fun. I learned how to feather a bit and hopefully will improve in that area.
Click on photos for enlarged views