Weapon modding 2.0: Checkbox to only show current Trader LL / owned mods, Shows trader / flea prices and build cost while modding, Highlights mods attached to other guns or ready to use, Button to detach items in use, Ability to zoom in/out.
Features
Adds a new checkbox in the weapon preset screen to only show trader items, and your own items ofc. 
Shows item prices from current Traders (Supports custom traders)
1.7.0 and onward also showflea pricesif the item is available there, also can abbreviate price tags:
Movable Build Cost Panel:
Button to detach items in use elsewhere (Doesn't touch equipped guns by default):
Highlights parts (Colors customizable in F12):
- Directly usable (Loose in stash)
- **Already present in the current gun build
- Attached to other stuff (But purchasable from traders)
- Attached to other stuff (NOT purchasable)
Colored borders while modding:
Shows items on PMC, as well as in Rigs etc.
QoL change: Ability to zoom in/out with the mousewheel for those big chonkers 
Everything is configurable in the F12 menu:
There is also the option to invert the Trader only view to show NO items from traders instead (Essentially flea and own items only):
If you have any issues, let me know 
I tested everything thoroughly, without crashes and issues, but you never know 
Credit to warafor the awesome original mod,
giving me the inspiration to push it to the next level.
Just extract the .zip file with BepInEx and user folder to your SPT folder.
**If you are upgrading from a version before 1.7.0: Please delete the folder "user/mods/ChooChoo-TraderModding-1.2.0"
Should you have version 1.0.0 installed, before installing the latest version, remove:
Wara-TraderModding.dll in BepInEx/plugins Wara-TraderModding-1.0.0 folder in user/mods
I changed the server mod to automatically get all custom traders that are installed.
Should work, but let me know if you notice any weird issues.
To further improve the QoL when modding your guns, the modding stats helper from wara shows stat comparisons in a nice Tooltip
SPT 3.11.2
2.3K Downloads
Update for SPT 3.11.X
As usual: If you find any bugs, let me know.
All looked good on my end, so far... 
Unknown SPT Version
9.9K Downloads
Update for SPT 3.10.X
Sorry for the long wait, and thanks to Fried Engineer for the update.
I quickly checked for functionality, and so far it looks good, though I did not test all edge cases (Custom traders etc.)
Unknown SPT Version
15.8K Downloads
Update for SPT 3.9.X
Did not do excessive testing, but everything seems to work as expected.
Lemme know if something is wrong. 
Currently short on time, so might not immediately fix specific stuff. 
Unknown SPT Version
6.2K Downloads
If you have a previous version installed: Please delete the folder "user/mods/ChooChoo-TraderModding-1.2.0" when installing this version.
(I could no longer stand that old version tag in the folder name 
)
- Can now show flea market prices for items that are available on the flea, but not on traders (Red price tag, shows cheapest possible price)
- Abbreviated price tags (69420 becomes 69,4k, ON by default)
- Small fixes
Unknown SPT Version
2.9K Downloads
- Update to SPT 3.8.1 (Should support all 3.8.X versions of SPT)
Please update your SPT install to the latest version (3.8.1 at time of upload) to prevent compatibility issues that might occur with other mods.
Unknown SPT Version
2.5K Downloads
- Fixed currently locked traders showing their items while modding
- Show the cheapest price instead of the last found. (Better in line with BSG's weird logic of "Find Parts")
- To match the parts found for a gun build, use 132 rubles for one dollar.
(The actual build cost for dollar prices is correctly converted via the actual price at the current traders.)
If you notice any prices being way off, or other issues, please let me know.
Not quite yet...
Details
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License
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Source Code
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Latest Version VirusTotal Result
https://www.virustotal.com/gui/file/8715af3890e9662fc281367e3aa961cdeced8b6e1aa06d7ddc38d3b6222f21e9