So has there been some confusion over the level of accuracy then??? :whistling:

0.025mm doesn't sound that unachievable. when I was looking for the xy table for my mill I'm sure I saw some precision tables in that travel range for around the £300-£400. bolt it to tee slot table you've all ready got, add a solid fixed gantry for the z and go from there on a trial and error basis.

I'm sure most of the accuracy you require will be achievable by finding the machines best running conditions for each material type and maybe establish a warm up routine so its not used when really cold......then it wouldnt matter if everthing was tight and binding when cold.