We all know the burnt marks on the underside of the wood
is the flask back from the laser hitting the metal crumb tray.
I know masking help reduce this.
I haven’t experimented with anything yet but to eliminate or
at least really reduce the burn marks I was thinking of
not using the crumb tray at all and propping up the material
up with a smaller tray of some sort.
Just wondering what your thoughts are on this.