That's fantastic! Thanks for showing it within Bryce. I have Bryce 7.1, but haven't used it in a long time. When I do, typically, it's to put a 3D model set in an outdoor setting.
What free software did you use to model it? I use Maya 2008 and zBrush 4r8. (I'm on Maya 2008 because I got it in grad school. Getting it at non-student prices is prohibitively expensive.)
I use a real simple program called Wings3d, then I save each piece as a obj file and import to my Bryce library. Then I assemble and texture everything in Bryce. I have a huge library of parts that I re use, so its more like assembly line work now