Lathe cross slide conversion to a ball screw

[tonyfoale]

For a while I've been on the lookout for LH <12 mm dia ball screws preferably with a ca 3 mm pitch w/o any success...
Q: Isn't the movement so darned smooth now, that the cross slide will move when turning due to the unbalanced improvised handwheel?
Johan

I have been unable to find a LH version also.
No, there is no problem with unwanted movements. The action is very smooth but not loose, there is enough friction from the dirt seals to prevent back driving and the unbalance from the handle is trivial in comparison.