Steel tube walls are 1,50 mm thick and aluminium 2,00 mm. Distortion not yet noticed, but presure of oposite bears is unequal since product dimensions are with so much variablility. Bad quality. Sanding helped much.
This is for Y axis and here is how (see atachment). This is not exact match for previuos since is nut now moved to other side, but close enouugh. Looks like 3 rails on each side but realy only midle is rail while two other is short parts for orthogonal support and adjustabile fixation. Alu-profile continues down (right) to X axis which is under table. Clasics...
Drawing is in Corel Draw and mainly based on ISO262 and what I learned in highschool. I tryed in 3D studio Max but one screw thread is to complex for modeling on my PIII.
Bojan