I treadle a BU Nova, and don't like it. Sweet, sweet machine, treadles smooth as silk, easy to switch between treadle and house power, but it takes high-shank feet, which leaves out every foot I own but the one on it. (That's why I've avoided slant machines, much as I like them. How many feet do I really need?) I'm seriously tempted to either A: lower the presser foot bar (I don't know how doable that is) or B: move it on to a new home. It does take ordinary 15x1 needles, which is nice. They are superb machines, whether treadled or powered.