Sport scale would be a more accurate model rocketry term. We know the major component diameters, engine sizes, SRB's (segment sizes are known, so we can calculate length) etc from the Shuttle. We can use NASA drawings, photos, etc. to calculate the rest and have it good enough for a sport scale or slightly better than sport scale model. We have good images of the 1st stage, the Orion SLS Abort Test, SRB testing, etc. In fact, there are enough good high res images to make a much more detailed scale model than what Estes is releasing. Some of those details may change before the first flight, though.

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