After some discussion on the Denford forums I have stumbled across someones solution for the automatic tool changer on the Mirac:
After reading this thread
http://www.denfordata.com/bb/viewtop...2043&view=next
The automatic tool changer is making more sense. The
VB script he used is here:
http://groups.yahoo.com/group/mach1m.../message/94962
As soon as I have the main board from CNC4PC I should be able to get pretty much everything working.