I'm having trouble uploading my blender.stl file onto shapeways. I've looked at my model and can't find a problem with the 3D model that is causing the problem can anyone help me? Here is the email that I'm getting from Shapeways everytime I try to upload the file Uh oh! Seems like your model needs a bit more love before our robots can work their magic. The 3D model DJHead6 you recently uploaded didn't pass all our automated checks, so it's not yet ready for 3D printing. The file is in the attachment.