I have a Hyundai Wia F500VM, unsure of its year. I work in a shop that is entirely clueless of their cnc dept. An ok Vietnamese guy is their #1 but he's self taught and has horrible English. Just to give yous an idea of what I'm dealing with. I have no one else to turn to. My mill is dropping tools from the pot side during ATC cycle. Regardless of tool size shape or weight, they're falling. My company has had a service company out several times regarding this mill, and have replaced plenty of parts, repositioned, changes references and orientations, and they still fall. Any advice, troubleshooting, or ideas would be greatly appreciated.