what model chnc do you have? i had a chnc I and i have all the manuals for it. mine was also a seimens control. your welcome to come and pick up the manuals as i'm in sterling heights. i would forget about the stock ball screws for the x and z if you really want a gang style lathe. the x axis screw is so short that you won't be able to get enough tools on there.
hardinge also closed their in house tech support and its now run by another company that knows very little about these machines and they have no factory training.