Would like to know, what happens if the cutting laser accidentally hits a hole in the wood or runs past the edge of the material? Will it damage the unit? (It seems obvious that one shouldn’t do this on purpose, but are there valid reasons to do it?)
As long as your crumb tray is installed correctly, the laser won’t hurt anything in your machine. It has been shown that it is possible to put the crumb tray in backwards, and then accidentally cut into the plastic part, so don’t do that!
Engraving over the edge of material is routine for edge-to-edge printing.