Access child relationships through merge syntax

I tried what you suggested but I have not been able to get it to fill in the condition code field. 

I have a model entitled NYItemMaster from this model I want to copy certain values to a sales order lines model.

NYItemMasters has a child relationship to Inventory_Items. There is a condition code lookup field in Inventory Items to an object condition code. I need to copy that value to the SalesOrderLines model.

Sales Order Lines has a field entitled condition code that looks up to the same condition code object. 

So far I can not get this to work through the child relationship with the merge syntax provided. Can you see what I am doing wrong?

Here is what my code currently looks like:

{{$Model.NYItemMaster.data.0.SCMC_InventoryItems__r.<b>records.0.</b>SCMC__Condition_Code__r.Id}} 

Thank you for any light you can shed.