So I uploaded my first file to Shapeways recently as an STL exported from Blender. The object has a 0.7mm wall width which is the print minimum but a day later I got an e-mail from SW saying the file could not be printed because the wall width was 0.55mm. I had defined the width in Blender using the solidify modifier and was careful to set my units to metric. I went back and compared the dimensions for the whole object in Blender against the dimensions SW gave me when I uploaded the file and they differed by no more than 1/100th of a mm. Very confused as to why SW thinks my wall is 0.15mm thinner than I designed it. If anyone else has had a similar issue or could offer some insight I'd be very appreciative!