A few times now. In mid April it was about 68 percent, and as of a couple weeks ago it was sitting at 74 percent. Keep in mind that what’s important is keeping your content consistent while tuning, and not the overall content. From what I’ve seen so far, a good tune on E77 will run anything from 70-85 fine. I’ve personally witnessed NO change in AFR when going from E81 to E76 (logged multiple pulls, not just glancing at the wideband). Eventually I’ll test from 70 to 85, etc, and record any changes.