Oh wow, this is too cool EH! I was hoping that someone might take up the Midi story :)
I like your M.650 and, as with the IAe 26, it makes me wonder about the RW 1940 M.580 project. I believe that this Midi project had tandem HS.12s arranged like those on the Arsenal VB.10 (maybe Tophe can confirm?).
Your SNCAM M.721 is a big improvement over the IAe 27! Not quite sure what Émile was thinking with that funky Pulqui I engine installation

BTW, I love those tail endplates on your
Cimeterre too!