If you see photo number 13 you will see how much space there is. This space isnt enough to match the ball screw between the plate and the 80X80 box beam. So i could even make the gantry a little bit wider or match the ballscrew at the outer side of the red aluminium plate. My first thougth was to put the X axis ballscrews at the same vertical plane as the profiled rails of x axis. In that case the x axis ballscews would cross the back plate of the aluminium construction that i use to attach the steal beams with the profiled rails. I dont know if this is a good idea as in this case i will have the x and y axi ballscrews been corsed very close each other.