A friend of mine, who is a school teacher, asked me for a sign for her desk. The idea that some student might be inspired by something I made was awesome.
Slate rock coaster. Xtool will default to 50% laser power. I have more success with 70%.
I always use the hold down clips because the slate can move, just a little, with the back and forth of the laser gantry. Place them against each side to help stop any movement.