[kodama]

Not to argue, but the J7W2 defientely a plan that involved taking the J7W1 and refitting it with a Ne-130 axial-flow turbojet that would have offered a slight performance boost over the J7W1. We've already ventured into the realm of the theoretical so why not make what we know was planned. Sure, the J7W3 with the shortened gear and a bubble canopy is sketchy, but the J7W2 would have made it up had the war not ended.

Jet version was referred in J7 planning meeting, but plan for jet version didn't take a step and any source for modeling was not existed, concept art, fig. of cross section and specs by IJN or Kyu-hi.
Maybe sketchy of J7W3 you say is just a fun art.