Has Shapeways looked into options for recycled metals for use in their 3d printing pipelines? I know many jewelry-producers (both individuals larger companies) are able to boast about using recycled materials in their work. Having at least, say, a recycled silver option would be a great start, and help attract both designers and customers who are otherwise concerned about the sustainability or source of the production materials. A recycled metal option would also be a valuable differentiator and help Shapeways keep ahead of their competition. Any other designers interested in this option?