In the latest pass over the trees, the "bump" at -10 microseconds is no longer present. The difference in N is ~1e-3. The rate for 100 ns to 24000 ns, 120 mm impact parameter cut, is lower by 2.7 Hz compared to my previous result. The Tmin/Tmax scans pretty much look the same. It seems we still have a discrepancy between my and Tom's result. BTW, the impurity capture yield vs. Y looks the same. Steven