[CPR barrier - how well do you know your hiking partner, you may not really need it. What are you protecting yourself from?
I know that this item is something I will probably never need. However if I ever run across someone who needs CPR(not necessarily my hiking partner), chances are it won't be a pretty sight- I'm talking blood, vomit, etc. I'd hate to have to choose between performing cpr and someone with a messy trauma(possibly to the face), and denying care. I'm not very squeamish, but I remember enough pictures from training that I never want to face that dilemma.
I used to also think that CPR in the backcountry is pointless, and most of the time that's probably true. But apparently(from what I'm told) the exception is when someone is struck by lightning, in which case it is possible to perform CPR and have the patient spontaneously recover. And lightning is a very real possibility in the backcountry, especially near the tops of mountains.
You made some great points, and I've already removed some of those items, and I'm sure I'll make more adjustments to my gear in general on the trail. Again I'll post an updated inventory soon.
While writing this post, I just came up with an interesting idea, that either brilliant or really stupid: I had already decided to skip the sawyer extractor, but it just occurred to me that my water filter is a pump which can produce fairly strong suction! I could just bring along the tips from the sawyer extractor, and by attaching it to the water filter tubing where the prefilter normally goes, I have an instant suction device that is probably at least as strong as the sawyer. I think the tips are the perfect size to fit the tubing, but I'll have to experiment to make sure.
There are 2 drawbacks I see to this:
1- this would require at least 2 hands to use, so may not work for self-aid,
2- because of contamination issues with the water filter, This should probably only be done for a life-threatening snakebite or scorpion bite, and not for more minor insect stings that the sawyer could potentially be used for.