Thank you for this great machine. I really had fun making it.
I just assembled the new Z-axis, but the it seems to be a (too) tight fit for the Z tubes. Especially the XYZ part seem to flex when I push the tubes in. I have imported the XYZ stl file into my CAD program(onshape via freecad)and added the bearings. As far as I can see the "circular distance" between the bearing is approx. 24.6mm. This seems tight, Is this correct?