Taking things slowly and methodically, though, helped.
The cross-cut left a very fine checkered pattern on the part. I dig it, since it's very reptilian to the touch, and this is going to be a heavy lander shuttle for a race of sci-fi Snakemen known as the Astagar.
Here are some pics of the finished part...
Now to machine about 7 more pieces and get them all together, and then rapid-prototype the detailed bits that will be adhered to this beast. It will be a lovely hybrid. Stay tuned.