Creating and associating parameters in a host family to parameters in a nested family

It would be great to have a Dynamo Script that listed the parameters of a nested family. If there were no conflicts with existing parameter names in the host family, the script would creat identical parameters in the host family and link these to the parameters of the same name in the nested family. My understanding of Dynamo is pretty rudimentary but would love to attempt creating i or -less ambitiously - find someone who already has done such a thing. I tried this:

But for some reason it doesn’t seem to be working for me. Any help would be greatly appreciated. A common scenario is to take a generic model family and to place it in a face-based family. It would be great if the parameters of the nested generic model family could simply be passed through with a simple procedure in the host family using a Dynamo script.