I am trying to export a small part to be printed by shapeways, and since shapeways requires an stl, I'm saving the file as an stl.  It is in inches, and I know that the measurements are correct while I am in solidworks, however, once I upload the file into shapeways and choose the inches option, the scale is completely off (it is much bigger than it used to be).  I've tried this with other 3d printing services and exporting it as an stl always yields the same result.  Any ideas?