custom table child tasks: want to bring variables from the parent table to child

Hello everyone,

I have created a scoped application that the end users wish to add a request functionality to. I have created 2 custom tables, one extended from the sm order table and one from the sm task table. I am using a record producer to create these requests on the custom tables and I am easily able to use the existing sm variable editor to expose the record producers variables on the "request record". What I cannot figure out is how to expose these on the child task table I have created. 

Since I am not using the request application I cannot use the catalog task functionality in my workflow. I must use create task instead. I have created a new variable editor for the table as some of the docs suggest, but it does nothing. I have found a number of older threads that say this cannot be done on a child table  like I am trying to do, but they are a few years old and I was hoping this may have changed. If I cannot use the variable editor could I do this with scripting in the create task function? Any suggestions would be greatly appreciated!