I let my SB run unattended for the last roughly 7 hrs of the finish pass. I went home and slept. I was pleased to come in the next morning and see the Bot at 0,0 and my porter cable router still running at low rpm.
Trust me I took all safety precautions. No dust collection, no vac hold down.
It is not something I plan on doing again, but it was for my grandfather and it was right before I had to get on a plane to DE for our family Christmas visit. I actually carried it on the plane raw cnc carved wood. Then stained it in DE in my Dad's sheet metal shop right before I gave it to Poppop. He loved it, and it was still a little taky from the multiple clear coats I was giving it from a spray can.
The wood was a piece of scrap of 1.5" thick western red cedar I had from the corner of a sign I did years ago..
I bought the 3D art from https://www.vectorart3d.com/
Dave