Joseph……….
NO, not lower-end, but:
we are misnagid Litvak on paternal side and Yekkah on Maternal side.
Eldest son has a fix-up date about 20 years ago and took the young lady to a fleishige restaurant in NYC that was under O-U supervision. She refused to eat the beef because it wasn’t a particular chassidische shiciteh.
Among the major kosher supervisory organizations we eat O-U. O-K and Star-K without questioning the other hechsherim the product or establishment might have. I don’t consider that lower-end. For example, we don’t hold by Triangle-K, Chaf-K or KVH (even though we are New Englanders) without further information.