Here is the final version using a central 250mm x 120 mm new plate.
You can see the older little one on the right side of the cnc..
The x-y max ranges are now 220 mm for x axis and 148 mm for y axis.
Everything super stiff. I have four 3d printed supports for the plate, done with 2x2060 extrusion bars of 250mm lenght each.
Time to move on new z castle and motor
:-)