Hello, I've been trying to get a pendant made for about a week now, and I've been running into the issue of the model being rejected on the basis of the wall being too thin, but I'm not sure what that means or how to correct it. The model wasn't built by me as a model, it was a b&w image of my design, uploaded via an easy creator which, in turn, extrudes it out. The Shapeways rep I've been working with was able to send me the STL, but wasn't able to tell me what to do to fix it. Or am I off the mark here, and repairing means making an adjustment to my 2d design? Help, anyone. It would be much appreciated.