RE: treiner jets
Thanks Dave, I saw the Japanese DJ-3 and it is very similar to this plane, but this plane is also very similar to a very old BV ducted fan design called "Sundowner" that resembles a Phantom with a exposed fan, and I remembered
this particular plane when I first thinked about the JM-1. I also picked many features of some planes like the double-delta wing platform of the Kangaroo, the easy building type of fuselage of the Facet , etc.
Regards, Enrique