i can measure the ball screws for you. Have them shipped in convenient lengths, ball screws are HARD to cut, turn and thread.
The x axis ball screw is captive on the right side, it has a radial and thrust bearing captive to the table and screw. the left side should have a RADIAL bearing and the ball screw MUST slip in it. As the temperature changes the the screw lengthens and the left side of the screw should be allowed to slip in and out as needed.
The y axis far end is free with no bearing as it is so short.
Z axis has a bearing on the top and bottom
Pics, drawings and video are coming for the z axis
ALL ball screws use 2 ball nuts