What is part way between a printed circuit board and a rats-nest of point-to-point wiring? We’re not sure, but this is it. [Johan von Konow] has come up with an inspired solution, 3D printing… ...

Skip to 8:10 in the video if you want to know all about that. The result is a 3D printed nylon object into which solder-able copper traces are well and truly embedded.