Yeah mine are genuine then, they feel like rubber. Also i checked some images and they look genuine. markings and so on. I see on your image you building a router as well, very nice. And you use 2 bearing blocks on the Y and Z axis. Do you think that enough, I didn't do any calculations for my design but if the load would be OK with 2 for each axis i am considering redesigning. Also what ball screw diameter you use on these.
Also on my design i use a 5KG spindle ER20 2.2kW.
For a drive system I use 2005 ball screws with a double nut. and leadshine closed loop steppers 283 oz torque. only thing i don't like is that the shaft on this motor is a 1/4" looks very small, any suggestion I should go bigger and use NEMA 34 with 566 oz torque close loop stepper system.