Laser mount for CNC 3018

Holder for [the laser module](https://www.banggood.com/405nm-100180500mW-Blue-Violet-Dot-Laser-Module-Variable-Focus-w-Heat-Sink-for-DIY-Laser-Engraver-Machine-p-1589033.html) or for [this laser module](https://www.banggood.com/405nm-100-or-180-or-300mW-Blue-Violet-Dot-Laser-Module-Variable-Focus-TTL-or-PWM-Modulation-w-or-Heat-Sink-2_54-3P-for-DIY-Laser-Engraver-p-1594449.html) for CNC3018 carriage and lens protective cap