Hi, A have a little bit of an issue that's cropped up several times. I design small detail parts and scale models for science fiction and ship modeling. The vast, vast majority of my parts need to be printed in ultra detail or ultra frosted detail simply due to the scales in which I work and the level of fine detail that's needed to make the part look accurate. However, sometimes when I upload parts these two mediums aren't listed as printing options. Does anyone know why this is? Its very odd, as I'll sometimes upload parts for the same model separately, done in the same CAD program and featuring the same modeling and design features, often the same or similar geometries, and one part will have more printing medium options available than the others. Any ideas on why this happens? Is there a way to specify a medium for printing that isn't listed in the part's pull down printing menu? Thanks, Bob. PS. I would add that the materials Shapeways will let me print in are too course, in terms of detail, for the model. It will pretty much only let me use metals, which have a minimum thickness of 1 mm, plus white-strong-and flexible. My parts have a detail fineness of 0.3 mm, just what the ultra detail calls for. Basically,Shapeways is calling out printing media that its own specs say can't be used to print my parts. Any ideas?