I am also interested in this, as I have a Leetro MPC6535 controller in my 1290, and it will not engrave a 900x900 square filled with 6mm hexes that I would dearly love to engrave/cut into a 12mm board of mdf for a wargaming table.
Here's a thought:
Is the inability to load this job into the laser a problem with the laser controller /memory, or my computer. My computer is an i7 with 32gb of RAM.
Comments and thoughts welcome.