Jonathan i agree with you but i must leave at least one small cutout in order to be able to work with the ball screw and also in order to pass the ballnut . How thick plate(steel) plate should i use? At he above plans the plate is 10mm. Also i want to say that i put the ballscrew near the bottom of the gantry and not at the middle, in order to have the ballnut as close to the collet as possible. Is that correct?