Ok question whilst Im back to the drawing board.... Can I run profiled rails upside down, as in, on the base of my gantry box section? If not I will have to build the Y axis completely differently to the way I intended and therefore the Z too.

Also I have seen the difference between the 2.2kw and 3kw spindles and am aware of the differences, also the diameters are different 80mm vs 100mm I recall? I will use the 3kw at some point, but as with everything, budget has to come in somewhere.