I have just completed the first cut of a new machine design. The base apron and head are to be epoxy granite and the vertical would be a 6 x 12 filled with epoxy granite. The cylinder on the back would provide force to offset the weight of the head. All of the rails would be 25mm and the ball screws 20m. As it is now the travel would be X 18" Y 12" and Z 24". The design also calls for a 16 position tool changer. I would appreciate comments and or suggestions.