Obviously I couldn't copy his design exactly. What I'm saying is there are many ways of accomplishing the same task. A boost leak tester by nature is so generic that a patent will be difficult to enforce. After all, it is essentially a pipe plug with a fitting and a gauge. Any slight deviation from his design makes a competing product different enough that he would not be able to enforce his patent.
LOL @ petty jealousy. Please explain why I would be jealous?