Hi Tweakie, I'm actually planning ahead with my 2nd cnc build to be fitted with a laser to cut 5mm thick wood, maybe plastic slightly bit thicker and a 40 watt laser soundss to be a decent size for my application. Although I would still to do some more research about this, would you mind telling me what type of laser you have and maybe where you bought it from? The thing is that I'm not a fan of co2 lasers because they relatively bulky and delicate, as opposed to the diode types.
Thanks
Marting