Lightbars 4.0 for extrusion based 3d printers

This project is an upgrade to my previous lightbar work. It extends the edges of the lightbar to make for more comfortable printing with a printer at eye level, adds 2 new sizes (200mm and 100mm) for use with smaller print beds and printers, introduces a new fully enclosed lightbar mount for use with these extrusion slot covers (http://www.mcmaster.com/#catalog/122/1939/=14feq5y) to run wires from the lightbar to the frame edges fully concealed, and also adds my corner reinforcement covers, whic