Here are the two columns already cutted
And once they are already finished the holes, to screw the components
For one side the housing for the bearings of the Y axis
And for the other, the motor support, with the hole I mentioned before
And with the same technique to joint the boards, for the central beam
The two columns already mounted with the bearing system.
Also, the center beam and the inferior beam must have the same lenght, if not, bearings will not fit correctly.