Review on Enhanced OBD2 Breakout Box: Protocol Detector, ECU Connector & Diagnostic DLC for Efficient Maintenance, Diagnosis, Programming, and Coding by Chuck Shapiro

This is a fantastic breakout box. After you've made a few of your own in a year, it's like night and day getting used to being professionally made. The customization options are limited to just the aftermarket gear you have plus any junction boxes and it takes many additional tools as well as extensive knowledge of automotive electronics and tuning to take full advantage of them. It's a truly amazing tool that can completely change your experience or the experience of your store, provided you learn/know how to use it and have some other tools and software that depend on your setup.