I sent email for you to send me pictures of the bearing houses i sent you with machine and when will you be sending payment. Never got an email back or heard from you Because you where using acme screw i remember sending you all closed end housings which don't work same way on ballscrew.
On rolled ballscrews , by saying they are all the same , is like saying pool cue with sticker as inlay is same as machining in the inlay.
China rolled screw do not compare to Taiwan or Japan rolled.
China ground screws don't even compare Taiwan rolled screw.
Ballscrew on Raptors or any of them with upgrade is .00001 , stock ones are .0001
In China, .0006 is just on paper , not tested to each ballscrew.
Upgraded ballscrews on machines are rolled and ground Finnish
You wont find a china ballscrew work like on in video below
https://www.youtube.com/watch?v=5vEtAwySvgc