Wordfly Survey Page Responses - customized stored procedure examples?

Hi Fiends, 

We are working on our LP_WF_PAGE_RESPONSE_CUSTOM stored procedure in the hopes of sending one survey answer back to the constituent record as an attribute.

The use case is a member birthday club in which the member receives a wordfly email, follows the link to the birthday club (survey) page and selects their birthday month from a dropdown list. That part is working well, and we can see the data populating into the 4 Wordfly tables, but we need some help getting the data into the constituents record as an attribute. 

Would anyone be willing to share their LP_WF_PAGE_RESPONSE_CUSTOM code as an example? 

We are self-hosted.

Thank you!