You're totally right, Craig; these devices are a lot more than simple adapters. I used that term because that's how they appear to a user - they go in between the USB or ethernet port and plug in where the G540 is expecting a parallel connection, But there's a lot of "smarts" inside. And you're also correct about the number of fakes out there. Just get them from Arturo at CNC4PC,com (https://www.cnc4pc.com/motion-contro...ers/ucx00.html ) and you'll be fine.