Came out very nice, have done a few of those as well.

I leave my machine unattended all the time, the ability to make something while doing something else [whether it be sleeping, going to the store or taking the dog for a walk] in one of the prime attractions to an automated machine to me. Especially in the freezing cold, no way am I going to sit out hours on end babysitting a running machine.
I know that some guys have had incidents of sucking in hot chips and starting a fire [happened to Jim Mcgrew if I recall correctly], but I won't let these isolated incidents keep me from taking full advantage of what the machine has to offer.

Turning off vac/dust is a good precaution, not that necessary on a finish pass anyhow where chips aren't flying. In fact, tough to see how anything else disastrous could happen while running unattended that wouldn't happen with you right there.