My Elna has perfect tension - always has had. I hate making a mistake with that machine because it's very hard to get out. My tension troublemaker was a 1961 Kenmore. That's why it was replaced, ultimately. Miss Elna likes old polycovered cotton C & C thread and Guterman thread, but recently did some applique with lightweight rayon and polyester and did a great job. Your tension example looks like my 1978 Montgomery Wards machine's work when it had the same lightweight thread in it.