The fact that they detected this from the exterior as well, and triangulated the void to the same position is awesome.
So many questions, though.
Did they target this specific location, or scan the whole pyramid? I wish the resolution was good enough to pick up the shafts, because I sure would be interested to see how the northern Queen's Chamber shaft bends around this void, and how far from it the shaft comes to an end...with polished tura limestone blocks....
My understanding is that they can't ascertain the orientation of the void, right? Direction of incline, etc?