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I saw this on my twitter feed, but then lost the link. Sorry for whichever media company I'm not giving proper credit to. Tried to find it again, but no luck. It was in a suggested twitter source, but suggestion didn't come back.
The sketch you mentionned seems to have already been shown for the Model 3, back in the days...
except may be the sape of the triangle 3rd rear window and the frunk looks shorter?