Well to those who said it could not be done... Used a cheap $400 k40 co2 laser to cut 12mm acrylic and 6mm acrylic parts for my open builds inspired machine. Modded to use Bosch Rexroth extrusions as the other stuff was too expensive to ship. Open builds rollers and spacers. 3D printed Z parts to be installed today. Slides really really smooth. Much better with the open builds rollers than the local made rollers I used on a earlier project. The ability to laser parts in house vs sending out for water jet saved a ton of cash and time.
The ability to machine things oneself is insanely useful. I've been using that cutter (K40) too, although my favorite material has been plywood. I have a question for ya: How the hell did you mod your K40 to get it to cut 12mm acrylic? And how many passes is that? I would trade my soul for the ability to use my laser-cutter to cut 12 mm (1/2 inch) acrylic, or even anything more than 6mm!
had a few issues with belt tension and the z flexes a tiny amount... got mostly fixed now, some tiny deflection still on certain cuts, but its getting worked out with a thicker center gantry https://www.facebook.com/video.php?v=1736380929964893 Video of it machining "hello world"