I made this in Google Sketchup. Anyone who uses the program will immediately notice how shoddy my work is. :-) I do okay with sketchup but what I'm learning is that the more you preplan, the easier your job will be once you're in the program. My problem is that I usually start working in sketchup with only a rough sketch or vague idea to go on, hence all the patchwork and makeshift techniques. Still, I don't worry too much since all the stuff I do there is only as a guide for my drawings.
I know this sounds like sucking up, but serious thanks to Google for creating this program! For comic book artists it is the best thing since sliced bread (and by sliced bread I mean Photoshop).
By the way, if anyone recognizes the number I used as the registration ID I'll be impressed.