Make sure that you know the basics first. You can learn how to make a regular merchant here: https://www.creationkit.com/index.php?title=Creating_a_Merchant
Putting them in the chest is not enough. You have to make sure that the actor is allowed to sell and buy those items.
You have to make a new faction for the merchant.
Then make a new formlist and put the keyword zad_InventoryDevice in that formlist.
Go to the vender tab of the new faction and make sure that the option “Not Sell/Buy” is not selected.
Go to the option “Vendor Buy/Sell List” and select the formlist you just made and click OK.
You then add that faction to the merchant actor.
You’re right about the Inventory versions. Those are the ones you have to put in the merchant’s container.
You can also load my mod in the CK to see how I did it.
Original URL: https://www.loverslab.com/topic/35569-devious-devices-expansion-42-2018-11-01/?do=findComment&comment=2499006