Another super video Mark.
As Andrew says "Only those who never do anything don't make mistakes!"
The important thing is to learn from your mistakes.
I've not been able to hit the emergency stop button quick enough when I've seen my 6mm end mill at 10,000 rpm heading for the head of socket screw used for clamping at 2,000mm/min. The sparks, smoke and the inevitable cracking sound all happen in the blink of an eye. And my CNC mill is a baby compared with yours.
Keep 'em coming.
Phil.