While not necessary for every build, a concentric twist is commonplace in many motorsport wiring applications and while the physical construction is often where people look for knowledge on the process at first, the planning stage is really what determines a job well done or a job done twice. We're using a V8 engine swap project for this example, running a MoTeC M170 ECU, which is just 1 of over 40 modules in the Professional Practical Harness Construction Course offered by the High Performance