This is my homemade laser I built in 2016. I originally bought the popular blue 40w laser cutter from china for $300usd on eBay and was very disappointed on the box because it was very limited in function and it leaked a lot of smoke in my room at the time.

The box I made has a lid that is not at an angle, unlike the original metal box, and that allows me to put objects on top and not have them roll down. This box is also much better sealed and sucks most of the smoke out through the air duck. It's not perfect but good enough. Also I added a new computer that works so much better and has a beter software to work with.