I’m really gonna sound like a moron here, but I didn’t fully get the Falcon’s interior (in terms of dimensions, what leads where etc etc) until TFA. The fact that the movie makes a point of walking through the set the way it does made me put it together properly after a mere 40 years or so!
Lego TFA is what did it for me. Being able to actually walk around freely in it…I even used it as one of my references when building the Falcon in Minecraft.