Custom Item as Currency

Hi there! 
Love the plugin! 

I am customizing it to suit my server, and rather than use economics or scrap or something, I am making 1 item with a rare drop chance. 

am I able to use custom items as upgrade currencies ? I dont see a spot to put the skin ID of the currency item, 
Does it just use the display name to find the currency?

Any help with this is greatly appreciated!! 

SOLVED

I apologize! Just had to dig a little deeper!  

This plugin is a Tinkerers dream lol! 
Soo many settings to chose from. 

Didnt realize the required items followed the same format, 

For anyone reading this in hopes to have the same question answered, 

Within the: Required Items: [], 

add:
{ "Shortname": "wood", "Skin": 0, "Amount": 14000, "Display Name": null, "Icon URL": "" },

example:

Required Items: [
    {
        "Shortname": "wood",
        "Skin": 0,         <-   custom item skin there. 
        "Amount": 14000,
        "Display Name": null,
        "Icon URL": ""
    }
]

Changed Status from Pending to Closed