anti-back lash nuts

Apart from alot of lurking, I think that is the first time that i have
posted to the group. I have an elderly Boxford lathe that I am moving
towards using CAD-CAM on (mainly for taper turning screw cutting etc.)I
have pulled the cross slide feed screw and nut out and am looking to
see what can be done to improve the back lash. (its not bad for its age
and being a lathe as well)I have seen several references to slitting of
nuts, adding of extra nuts and spring pressure and using other sections
of treaded rod as a nut. But what I would like to know and get advice
on before I start slitting my expensive to replace nuts is, how
sucessful have these methods been ?

Regards Bob