Hi Fred. Thanks for your response.

After googling around a bit, I'm pretty sure I have 3rd Generation Cubes.

Thanks for your suggestions concerning software. I'll avoid Sketchup and look into the other options you mention. Adobe Illustrator is a 2d application. I'm confused that you bring it up in the context of 3D printing. We do have Adobe's Creative Cloud suite in our labs but I don't see the application in 3D printing except perhaps as a stepping stone to understanding artwork that is built using points and lines rather than pixels. Please elaborate.