I did not manage to get stitching done on both pieces but here is the first, well on the way.
I have put a mount in front of it to help me gauge the effect.
The stitching was done over polyester organza which I then burnt away with a soldering iron, because that was less fiddly than using scissors and you can get close to the stitching.
It's coming together, but still needs some more work.
I need to let it rest now for a while. It may need a bit of beading, some hand stitching or some more machine stitching. I'm not sure yet.
Watch this space.