All models at Shapeways are designed and sold by independent designers. This means they are the true experts on the models they designed, while we are experts in 3D printing models.
You can reach the designer and get your model questions answered via their expertise by going to the model's page and scrolling down to the designer's info (under model description). Here you can see the "Send message" button and get in touch with them.
Please note that you need to be logged in to send private messages.