For funs.... any ET guesses ??

You know, I didn't even think ONCE to see how it stacked up against the penalty box. Good thinking and I'm glad you mentioned it. So if you added a couple tenths, then the box had a index of 16.25. Another example where the box is close, and also that the 318 in DT did run hard for what it is.
Well dang it, I tried running the numbers again and came up with something closer to middle 15s. The unknown being your elevation but still, I missed it by more than I thought lol! Still impressive run though!