I have already doodled down some weapons. Just have to model them.
Here is a random one I made in a few minutes:
I hope it is easy. I know Sketchup supports exporting in essentially every file format known to man, so it should be okay. I can crank models out like nobody's business, so if its easy to then make them /work/, I'll be home free.
Also, I really hope weapons are supported. Space combat, anyone?