Has anyone seen a review or have first hand experience with this new crop of "blue" cnc machines coming out of China? They appear to be made by LY and have ball screws and linear rails. Also, on the 6040 the linear rails seem to be mounted to 2020 extrusion. Just for reference, I have owned one of the old school 4030 machines for 5+ years and it's been pretty good to me. I was planning on upgrading it to linear rails, but then I saw these and decided to ask the group.

Best,
Mel