From a long time i feel there is a need in this forum to have a WALL OF SHAME. Cause i am tired of reading overexcited stories from newbies. Lets hear the truth about the bad stuff they sell using fancy words out there. In my early learning stage, before a couple of years i also got scammed with my first machine. All were praising it on the Zone and i was like a stupid fish that bit the bait.

Hopefully there is a solution to your problems. I believe as ball screws are quite cheap, best would be to think it well and spend a bit more importing it from China and fixing it yourself. cause obviously the vendor will do nothing.