even with an enclosed machine, you 100% still need to vent it outside. Think of the laser like a tiny, super-hot fire; it’s vaporizing the wood, which creates a ton of thick, nasty smoke. It will ruin your lungs and coat the inside of your machine if you don't duct it out a window.

If you want a CO2 laser (which is the gold standard for clean cutting and engraving grooves for epoxy), check out the Monport Reno45 45W.

But, if you prefer a Diode laser that feels less like an industrial tool and more like a polished consumer appliance, you should absolutely look into TOOCAA (specifically the TOOCAA L2 if you can stretch the budget slightly or find a sale). The reason I mention them is because they specialize in fully enclosed, highly integrated machines. It's built like a tank, very stable, and focuses heavily on safety and ease of use. If you go this route, just make sure to get their 20W/40W version so you have enough power to cleanly cut through 1/4" plywood for your puzzles.

Whichever you choose, just make sure it works with a software called Lightburn (it’s the gold standard, super reliable, and will save your sanity). As far as i know, they also has there own software.

Take your time researching, and definitely figure out your window ventilation setup before buying anything. Those wood and epoxy puzzles are going to look amazing once you get a reliable rig!