Popular 3D printing marketplace Pinshape has been seeing at least 100% growth each month recently, and they're using designs in their market to put together an interesting series of tips in their recently released 3D Printing Trends report. With seven quick lessons in what makes 3D designs most likely to sell, the report offers help to those designers just starting to market their pieces. Check out what they had to say: http://3dprint.com/64951/pinshape-3d-printing-trends/