1. https://www.shapeways.com/materials leads to 2. https://www.shapeways.com/materials/strong-flexible all of the links for design rules lead to 3. https://www.shapeways.com/materials/strong-flexible-design-gu idelines A. https://www.shapeways.com/materials/material-options for WSF links to B. https://www.shapeways.com/materials/white_strong_flexible (an empty page) and C. https://www.shapeways.com/materials/wsfpolished (also an empty page) however A leads to D. https://www.shapeways.com/design-rules/wsf_bigparts The only link to the large parts rules (D) is via the materials comparison page (A). Also there is no mention of the 10% volume discount anywhere - but it still works (or should I not have mentioned that )