Hey Eric,
I needed to rebuild mine because it was too tall and I burned out the honeycomb with a new laser.
I liked your design a lot so I copied most of it. I added a sight window on the side so I can see if the laser is cutting through, added a stainless steel sheet on the bottom to keep from cutitng through the bottom and added some draft holes to the end opposite the vacuum hose connection. This thing is a lot more compact and lighter than my original one. Thanks for the design.
I also went to steel honeycomb this time. Its much more durable than the aluminum one and being able to use magnets on top is nice too. If you use a shop vac or dust collector you can use the vacuum as a hold down too (I just use some heavy paper to block off the rest of the honeycomb), but I would recommend emptying your dust bin or bag first just in case there are any embers (thats rare, but possible).
