Just uploaded a model, and some materials are missing. WSF is the only WSF based material available. Maybe it's the size, but if WSF is available shouldn't the others be? The object is 12.1"x12.1"x.2" (30.7cmx30.7cmx.5cm) which fits in the WSF requirements of 70cmx38cmx58cm. At it's current orientation it is too large for sandstone. Perhaps the new larger build volume didn't get copied over to the colored WSF?