Right or wrong it works, installed 2010 screenset and used the simple tool zero and yep......it works!!! Had the bit loose in the collet just in case!! Bought a trepanning tool from Wealden as recomended by Dean and set the height to the base and took 1mm off the bed (it's really bad!!) Felt some ridges so tweaked the spindle right by 0.2° and the bed seems pretty smooth now...

Click image for larger version.  Name: Trepanning_Tool_1.jpg  Views: 340  Size: 358.0 KB  ID: 18492Click image for larger version.  Name: Trepanning_Tool_2.jpg  Views: 319  Size: 393.5 KB  ID: 18493

Just need to do the limits so I can home the machine and put the fixed tool change plate on (when the new bed is on the machine!) and make the frame....dust extraction unit....put electronics in the box....etc. etc. etc. etc............