Click image for larger version. 

Name:	untitled.bmp 
Views:	463 
Size:	2.25 MB 
ID:	11446

Ok... I think this is ok.. I still dont know where I am going to mount the Z motor , so I have made the Z rear plate the same length as the front one (320mm) maybe the motor will mount on the rear of that, with the ballscrew on the front of the rear plate via pulley / Rails mounting on the front Z plate.