Best set I ever had was the Cul-M-Rite XL scales. It's a shame they're no longer in business. They were the most accurate scales I've ever seen! They tested perfect, on the mark with calibration weights, even after I changed the water-sealed battery. They'll never make them like that again.
They do make one that weighs 50 pounds also, I have it in my catfish rig and the 15 pound in my bass boat, I like it a lot better than the smaller one also!