An industrial 3D printer hums to life at bicycle maker, Trek. The designers are prototyping a new hand grip of soft rubber layered over a core of hard plastic. Traditionally, the print job would require the designers to switch print nozzles and materials or to compromise the design to speed things along. However, Trek is one of the first firms to employ the multi-material, color Stratasys Objet500 Connex3 3D printer. And their new grip can go from design to printed prototype in a single step.