No Gun Plaque

I printed one of Gecko's desk signs warning people that my 3D printer is useful for a lot of things so please don't talk to me about that damned gun thing. But I wanted a flat one I could print and affix to the front of the rolling cart my 3D printer is on, since that's where it's the most appropriate.

I wasn't able to get the original file, so I imported Gecko's STL into Google SketchUp, then spent ages healing surfaces and stripping out a lot of the unnecessary curves. No matter how long