Solid looking list, I wouldn't worry about dropping the extra filter if it gives you peace of mind since it only is a 3oz penalty.
I'm curius why you would carry something you don't "need"? That is exactly how you go from a pack weight of 45 lbs to a pack weight of 65 lbs.
Over the years I have been cutting all the things I don't actually NEED to take. By doing that I can go for five days of rifle hunting with a partner and have a minimum pack weight just over 30 lbs. That is really cutting though and not for everyone.