Okay, I got some “hard board”. This stuff is inexpensive and seems to cut well on the mill.
It’s also very quiet when cutting.
I used a 1/16″ two flute end mill at 9500 rpm. I used a feed rate of around 80ipm (I think that’s the units Mach III is displaying.
The g-code was previously posted. But that’s part of the fun of making a project like this.
I bet this material plus some aluminum angle will be a great candidate to make the structure for the Marauder project.