Hi, wellcome to the forum. What a lovely christmas gift for your son. Post some details of what you have and what any plans for the machines use. As has already been stated, it is not unusual to switch the spindle seperately, but it probably can be configured to operate automatically. I am sure that some of our more experienced will soon help you to get up and running. My niece has two lovely lads who also have DMD (now teenagers) and I think an interest in cnc would have been a fantastic interest for them. Good luck. G.