I'm mediocre at best at 3D modeling, and working on my first model for Shapeways. I've created it in Blender and uploaded it, a model of a house for an HO Scale model railroad. I've hollowed out the inside and the roof, and yet it somehow still seems to think that it's a $130 model. As near as I can tell, Shapeways thinks that this model consists of a solid interior. Is there some pointer you guys have for modeling such things for shapeways? My ideal was to have the floor and walls as one piece and a roof that's detatchable. Here's a link to the model as is: http://www.shapeways.com/model/223218/house_rough_9.html One odd thing I noticed is that the windows seem to be filled in, even though my model has them cut out.