Bill, I've got two Excalibur saws. Both green machines that both came with the crappy mechanisms that Excalibur had. I hated them. The changeover to Pegas clamps solved all my hangups. They are easier to use and stay in adjustment far better. And, the way the Pegas clamp bodies are made, using a high grade aluminum, will keep them from ever spreading like the Dewalt/Delta clamps eventually do. So, with that said, it's just a matter of keeping the clamp screw tips clean and flat. So far, after a couple of years usage, I've only dressed one set of clamp screws using a fine sand paper and a flat surface. The only complaint I have is the price and I figure that the import duty/tariff is responsible for a lot of that. Not sure but thinking so.