What are the requirements and process for obtaining a Non-O dependent spouse visa extension in Thailand?

Success of getting the Non-O dependent spouse visa extension today at Chaengwattana: My husband was sent to L1 first, where the IO informed him that I needed to be present for the extension. He informed her that he drove up there last week and they told him I did not have to come. They sent him to talk to 2 different IOs at N1. He was told to go make copies of all of his 2019 visas and extensions he's had. He was seen by a fourth IO and approved. He was asked to submit: the TM7, passport photo, copies of my passport photo page, Non-B visa and extension pages, a copy if my work permit, copies of his passport photo page, and all pages with visas or extensions in 2019, a copy of our marriage certificate, affidavit verifying the marriage certificate and 2000 baht.