About this mod
I noticed there was no way for me to equip leather arm pieces and metal arm pieces. I'm playing survival and for immersion, I'd put on as much armor as possible.
- Permissions and credits
use console command "help leathery 4"
This mod is a rudimentary result from practicing with fo4edit and I thought I would also give a tutorial for how to create standalone armor pieces for noobies like me
Tutorial for creating stackable armors
this video gives a halfway tutorial that might be helpful with my guide (armors are different as they have multiple Armor Addons):
https://www.youtube.com/watch?v=lZA1Z8rB4nA
1. using fo4edit (dl from nexus), find your item under an esm/esp -> Armor -> your-item-you-want-stacked
2. Right click on the item and select "copy as new record into..."
2a. Give your item a new EditorID (eg. I called one item "leather edit left")
2b. in the next window scroll to the bottom to add the new record to a new .esp (called <new file>.esp), give it a random name
This is your new standalone ARMO (Armor) record in your new .esp
Now each item needs it's Armor Addons (ARMAs). This process can be lengthy if you want to create multiple standalone pieces. In this example, there are 6 for each leather piece (3 are for light, med heavy, and 3 are for the studded variant, or something like that).
What you must do is in your new ARMO record, navigate ->Models; you will see all the Armor Addons you need to put into your new .esp. Looks something like this:

3. Open the source esm/esp -> Armor Addon -> find the first record (eg. AA_Combat_Arm_Right_1_Lite) (if you sort, all your Addons will be next to each other
4. Right click on the record and select "copy as new record into..."
4a. give it a new name
4b. add it to the .esp you made in step 2b.
5. Repeat 4. until you have something that looks like this (Combat armor needs only 3, leather armor needs 6)

6. After you have all the ARMAs you need, navigate back to ->Models and you will notice the Models under ARMO do not match your newly added ARMAs
7. Double clicking on the MODL field will bring down a dropdown where you must find the corresponding ARMA:

8. Repeat until all the MODLs source the Armor Addons you copied into your standalone .esp
Final steps include giving your standalone a unique name and changing it's armor slot to not occupy normal arm armor
9. navigate the ARMO file to BOD2 and you will see the "First person flags".
10. double click on the flags (eg. for normal arm armor it will say 43 - [A] R Arm)
11. deselect the [A] flag and select the [U] flag (eg. 38 - [U] R Arm)
12. Repeat for all ARMO and ARMA records
13. Under -> FULL - Name, give your item a unique name (I was just playing around so I named the standalone leathery armL and armR)
14. Save out of fo4edit- I found it worked for me after I went into Vortex and "installed from file" the .esp