I hope I have the terminology correct. I have no boring head (to mount boring bars in) for my mill, which requires an MT2 collet. I can buy one, but the cost is up there, around $200 . If I could build one, it would give me an interesting project, and a usefull tool. The attached tool is one that someone from another machining website built. I have an MT2 blank that I purchased and didn't use---perhaps I could use it for this. does anyone know of plans for a "build it yourself" unit???---Brian