I doubt if the die grinder will operate at sensible speeds for drilling and if it does I suspect that torque will be lacking. I would be delighted if it does, but I am reluctant to spend £40 plus to find out.
Having searched through my dead NiCd battery drills, I have found a couple of 18 volt units that resemble the all in one set up shown by Robert with his Bosch drill. These look a much better bet, so I will do the necessary work to make a tool post drill,
Andrew.