How are the noulei rails?
I have some noulei ground ballscrews for a 3d printer project that I want to do after my CNC build. They look quite nicely made to be honest... the guy I bought all my HIWIN and TBI rails/screws from also had noulei stuff, it would have been quite a lot cheaper.
Some of the chinese stuff can actually be quite good. Admittedly some can be utter crap, but I've had far more positive experiences than negative in recent years.