My base is just under 7 lbs.

Congratulations! If I were you, I would rest on my laurels.

I doubt there is enough 'wasted' weight in a 7 lb. base to make any appreciable difference on the trail, even if you were to find it and get rid of it. Unless maybe you are travelling ultra-long distances, on the order of 35 or 40 miles a day. In which case squeezing another quarter pound out of your base weight would save you a measurable amount of physical work over the course of the day. Otherwise, I recommend you stop obsessing over gear and start obsessing over getting the most days on the trail humanly possible!