Mini Lathe steady rest

Just my design of a steady rest for mini lathe (unimat 1, the first tool)

3 ball bearing diam int 3 mm ext 10 mm
3 screw 3 mm for roller l=15 mm
3 wahser 6 mm diam int 3 mm
3 screw 4 mm l=20 mm
6 washer 4 mm diam ext 10 mm
2 scew 4 mm for fixing on the mini lathe
3 bolt 4 mm
3 bolt 3 mm
2 slot slind nut Z042M Machifit