I have uploaded my first model on Shapeways and am excited about giving it a go. The model I uploaded has already been used to make a Z-Corp print on one of our in-house machines, so I'm certain it's closed and with correct normals etc. The detail on the piece is very fine but not thinner than .2mm I believe. It printed on Z-Corp, which isn't too good with very fine bits and only some of the fins on the columns broke off. In SLS, which I understand the Shapeways process is using (correct me if I'm wrong), these details should come out ok.
The Shapeways preview shows all the columns missing, however. I wonder if anyone can help me figure out what went wrong? I have uploaded the stl model.