hi Neil, Yeah the z has me worried. Like you say i was thinking of making a box for building up height if cutting sheet product,
Just wanted the option to cut thicker stuff, but i supposed there is a limitation in depth of cut due to length of router bit ?

With the deep table i was thinking i could leave options for future 4th axis to turn timber,

(Also perhaps a water bath if machine could cut some steel plate attaching plasma )

all dreaming, just priced 16 mm screws and rails at over $800au$ (not including 1 1500mm Y ballscrew)

maybe i should price up vslot extruded aluminium option.....
cheers