Good info. I'll need to make sure I keep an eye on it. Safety wise, I have a decent fire extinguisher nearby, a camera pointed at the laser, and never leave it unattended for more than a few minutes. Haven't had any flareups in a while, but I know it can happen if the motors stop and the laser doesn't. As for damaging the module, not that I want to, but there might be worse things in the world than needing to replace the 5-watt laser.