My Acra mill has an 8mm accessory mounting hole next to the quill. I took a 2" length of 2" X 2" X 3/16" angle and welded a short length of 5/16" rod on it. Now I have a place to mount my magnetic indicator arm or a magnetic spray nozzle. I gave the angle a quick fly cut so the magnets will stick better. I also gave the angle a notch for access to the mounting screw. I also made one with flat stock at 90° to the rod, but the angle is more useful and takes up the same space.