Not too long, I hope !
That's the layout, we have the least detailed source material about and to my opinion, in thath artists impression
was a lot of art mixed in !
As shown, the engine would have been completely buried in the fuselage, but when the objects just behind the inlets
are exhaust nozzles, the engine was either VERY small (definitely no T55), or would have used VERY elaborate exhaust
piping indeed.
Judging the cockpit, the aircraft seems to be a little longer, than the other two designs, the prop has got a spinner,
the tailplane was moved down to the fuselage and the sponsons were deleted, giving way to wings with larger span.
That would mean, that the landing gear couldn't have been stowed as before. A tailwheel isn't visible either, maybe
it was retractable, or the lower part of the fin would have acted as a tail skid. So, against my usual practice, I omitted
the landing gear from my drawing and relinquished the drawing of the lower side, at least until we perhaps may get more
source material one day.