In a recent video [QWZ Labs] demonstrates an interesting technique to use 3D printing to make creating custom PCBs rather straightforward even if all you have is a 3D printer and a roll of copper tape. The PCB itself is designed as usual in KiCad or equivalent EDA program, after which it is exported as a 3D model. By extruding the traces, you can subsequently put copper tape onto the printed PCB and use a cutting tool of your choice to trace these raised lines. After removing the rest of the copper foil, you are left with copper traces that you can poke holes in for the components and subsequently solder onto. targeted vapor-deposition of copper to make fully 3D printed PCBs and this method becomes even easier.