What is the process for extending a 60-day tourist visa in Chiang Mai using a Covid extension?

Update to our Chiang Mai 60 day tourist visa extension experience. Wife and I arrived in BKK on Dec. 18th. stamped in until Feb. 15th. Went to CM IO on Jan. 26th and applied for Covid extension, bypassing the normal 30 day tourist extension for the same 1900THB. Received an under consideration stamp for Feb. 10th. Went back this morning and in 15 minutes we left with a 60 day extension taking us to April 16th. This was awesome as they gave us 60 days from the end of our initial Feb. 15th TR visa expiration vs. from when we applied. We'll go back end of March to get another 60 day Covid extension.