I am in the process of designing an efficient yet inexpensive tool changer for use with X2 series mini mills. My goal is to be able to sell kits at a very reasonable price. Being a student in college I cannot afford to purchase a $1200 Z-Bot tool changer, nor would I want to spend almost 3 times what I paid for my brand new Harbor Freight Mini Mill, on an accessory for it. So what i am wondering, is what people are using already for tool holders. Whether it be Tormach Tooling System or High Tech Systems Rapid tool changer or something else that I don't know about. Using tool holders that are commercially available will help make the tool changer less expensive. In the end if I am successfully in producing a product that other people are willing to purchase I will be designing others for different mills, like the X3. So what is everybody using?-Adam