In any given week, I often volunteer to do failure analysis on a returned 3D printer. There is no better way to identify opportunities to improve quality and reliability than getting a first hand look at failures from the field. I take a very forensic approach to the work and enjoy getting to the root cause of subtle problems. What I don’t enjoy is scrounging around for the tools I need to do the work. For this reason I decided to make a personal tool caddy which contains exactly the right set of tools to inspect and service a Mark One printer. As an added refinement, I embedded magnets below each tool slot to keep the bits and sockets in place until needed. To prevent the magnets from jumping out of the print on to the print head (this happened on my first attempt), I embedded a series of thin blade sections from a snap off knife below the magnets. My first project which made use of embedding objects in a print made it clear to me what a great feature this is.