For this 3D project I set about the task of making a Grand Central key as a gift for a friend who is a Metro-North conductor. Metro-North’s trains usually have two different keys – one for operations, and the other for opening panels and doors, which all conductors have. I sketched and measured a panel key, and built a 3D model from that. Instead of the standard key end, this key is customized with the Grand Central logo – a stylized version of the letters GCT. For testing purposes I made a few versions of the key in plastic (aka Strong and Flexible – a laser sintered nylon) for testing, and then later made a version in polished brass, the traditional material railroad keys were once made of (today brass has been replaced with cheaper metals).