I found the videos helpful, as they did identify that the screws on the plate covering the drain plug are a Torx T30. However, the drain plug on my 4000 generator was not a 9/16", but was metric (12 mm). Also my drain plug had a crush washer, so I had to stop and take some time to go source a new crush washer. (Note a crush washer is a thick aluminum washer that is compressed when tightening the plug, and is intended to only be used one time only.) In some ways I was happy to see the crush washer as it took away any concerns about potential leaks, as they work very well.