Several people have used the Shumatech DRO-350 on mini-mills and mini-lathes. You can use the DRO-350 with either Chinese scales (calipers) or with a QCC-100 adapter board (one per axis) you can use quadrature scales. I have one mounted on an RF30 Mill-Drill using Chinese scales and another one built but not yet mounted on my lathe. There is a Shumatech website and a Shumatech yahoo support group.