Microsol Resources' Tuesday night presentation of Z Printers at Cooper Union was notable for scale of output, both small and large (very large). The 3-D printers produce a powder-based model where all unused excess material gets recycled within the machine. The copier makes tiny models with extraordinary precision. The prices run from $15,000 to $65,000. But a panel of four presenters said the printer's primary advantage is speed, allowing for new models to be created within 24 hours. Two firms made notable presentations. Xavier De Kestelier, an associate partner at Foster + Partners, veered from the script a bit when he showed a video of a cement printer being developed at Loughborough University in the UK. That hanger sized 3-D printer makes modular units that can be adapted as building components. Then, Wesley Wright, a designer with Pelli Clarke Pelli, brought the conversation back to the Z Printer, which he said has become an integral part of the firm's design process. The firm has four machines operating round the clock. Sketching right onto the models during the review process is not uncommon. In a video, no less than the maestro himself, César Pelli, intones on the importance of model making in general and on 3-D printers in particular. Wright has graciously, and exclusively, shared his video with AN. We nabbed the Foster/Loughborough video from YouTube. (Scroll down for the videos!) Pelli on Models from Architect's Newspaper on Vimeo.