While we are on the subject of noticing things. I was watching ANH frame by frame again last night and noticed the hero trooper giving instructions to the crew men on the Death Star has his holster attached with what looks like 4 rivets (2 per strap side by side). Then I thought a holster may have already been attached and a new one fitted, but why not use the same holes?
Not sure if you can see it in the photos, but you will see it on screen if you watch. No major discovery by any means, but interesting to me.