This simple mod rebalances weights, components and (for few items) prices of junk items to make it closer to weights and composition of real things. Bethesda made most of junk items overweighted, and few things are vastly... emm... downweighted? overlightened?.. I tried to fix it in my own way.
Theres few another things this mod does, and i want to tell about in more details:
It adds a new component - paper. I'm really annoyed by newspapers made of cloth... and books and mags made of nothing. Why didn't Bethesda made such a simple thing like paper? For now theres nothing you can make with paper (except selling it, because it have 10 value/weight ratio), but i'll think about it. Maybe sometime i will make some kind of crafting overhaul... or maybe someone else will use my mod as basis of something. We'll see.
There's no more weightless junk items. Even pen, or pencil have their little weight (though game will still show it as 0.0, because it always rounds values to 0,x). Subway tokens, prewar money, folders also have their weights now.
Of course Pre-war money isn't junk for most people. And for me too. So i've deleted "cloth" component from money, gave it weight (surprisingly big - 0.2 lbs) and adjusted it's price alittle.
Most junk items which were in misc section due to lack of components now have this components and placed into junk category. Burnt books and mags now contains paper, as folders do. Napkin is now made of cloth... and so on.
Overdue book now contains huge amount of good paper... so in some cases it may be better to scrap it and sell the paper, than spend book return tokens on burnt comics or baby rattle. Be aware, that it's now recognized as junk, so keep it in separate container if you want to convert it to book return tokens later. Though... for now, even if you'll place it into workshop with other junk, you won't scrap it accidentally until someone make something what needs paper as component to build.
I found it not possible to place ammo into Military ammo bag, but at least it now contains few components to craft ammo if you want.
I didn't edit any Bone items. I'm not actually confident, that my knowledge in anatomy is enough to know any and all human bone's weight. Maybe i will do it later... or maybe not.

I've tried to find weight values of real things closest to vanilla game, but for some things like Bag of Cement or Makeshift battery difference between realistic and vanilla weights is huge (though i tried to compensate weight by amount of components). So for now this mod is more realistic than balanced. I hope you, guys, will help me to balance it, and find mistakes if they're there.

P.s. I've made this mod mostly for myself, but then i thought that someone else may like it. So here it is. If you like it - use it, if you're not - don't. If you have any reasonable critics or/and suggestions feel free to share in comments.

To Do List

Adjust balance. Find and incinerate bugs.
Reading carefully any critics and/or suggestions. Figuring out if i can/want to do what was critics/suggestions about.
Set more realistic components and more realistic amount of them to static scrappable objects like cars, light poles, house furniture etc.
Find out, how to make scrapper perk affect not only weapons and armors, but all junk items... if it actually possible. Then, remake all the junk once more, for this perk.
Make crafting rebalance for some items, so they will use paper as crafting resource... or probably find someone who will do it.


There's a little bonus. I've also made a little mod that changes few shipments. Just my look on it:
Acid: Price 250 → 400, Amount 25 → 40
Adhesive big: Price 2000 → 3000, Amount 50 → 100
Aluminum big: Price 750 → 1400, Amount 50 → 100
Aluminum small: Price 375 → 600, Amount 25 → 40
Ceramic: Price 175 → 350, Amount 25 → 50
Circuitry big: Price 1250 → 1150
Cloth: Price 100 → 400, Amount 25 → 100
Concrete: Price 150 → 300, Amount 50 → 100
Copper: Price 500 → 1000, Amount 25 → 50
Lead: Price 200 → 800, Amount 25 → 100
Leather: Price 250 → 500, Amount 25 → 50
Oil: Price 500 → 1500, 25 → 75
Plastic: Price 75 → 300, Amount 25 → 100
Rubber: Price 250 → 1000, Amount 25 → 100
Steel small: Price 150 → 480, Amount 50 → 120
Steel big: Price 300 → 850, Amount 100 → 300
Wood small: Price 100 → 400, Amount 50 → 200
Wood big: Price 200 → 950, Amount 100 → 500

Other shipments are forced vanilla. Vendor lists untouched.
If you like it - use it, if you're not - don't.

Installation

Use NMM to install mod, or do it manually if you know how. If you don't use NMM or another Mod Manager and don't know how to install mod manually, then look at Gopher's 'FALLOUT 4: Installing Mods on PC (MANUALLY)' tutorial
This mod doesn't contain any scrips or something like that. It's safe to activate/deactivate at any time (i advise you to sell all paper you have before deactivating mod, because it will disappear after that).

Compatibility

This mod is compatible with any mod, which doesn't changes junk items.
It also mostly compatible with popular "Mo Betta Scrap" mod by Citre. If placed after "Mo Betta Scrap", JAWS will override most of his edits of junk items that can be taken, except bones, but won't affect his edits on static objects.
If you're using some mod that moves some junk items to misc tab and want to keep it that way, just load this mod after JAWS - it will override my edits.

Credits

Bethesda - for making this awesome game.
NexusMods team - for this awesome portal, which contains all the best mod's for several games. And especially for Nexus Mod Manager - this program definetly made my life better.
xEdit team - for their excellent FO4edit tool. I used it first time, making this mod, and i was amazed how convenient is it.

Feel free to use entire my mod or it's part in your own. Just give me a credit.
But be advised - this mod and everything based on it (if it will ever be) is for free.

P.s. I apologize if there's some garammatical and/or syntax error in description. English isn't my native language.