Dear Shapeway community. I am brand spanking new to the 3d printing world. I created an object in 3ds max, uploaded it to Shapeways to make sure the base structure would pass the tests and sculpted it in z brush. I imported it into 3ds max to re attach the hallow inside and got the ever dreaded non manifold error. I've tried running it through the non manifold filters in meshlab and shaken my fist at the heavens for making Magics $8000. I would just start from scratch again but this is a Christmas present and I fear that by the time I re sculpt or manage to sort this error out it will be well into January. I know this forum is flooded with fools like myself but I would be very appreciative of any benevolent help. The scale is in Millimeters.