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Hi all, here are the updated numbers for reweighting the SP5/SP6 ratio for signal MC to be the same as the Run1-3/Run4 ratio of BBbar events in data, as we talked about in the previous vub-recoil meeting. In data, we see Run1-3(BBbar)/Run4(BBbar)=1.105 (using BbkLumi). For nonres signal MC, we have SP5/SP6=0.980, and for resonant signal MC we have SP5/SP6=1.217 (looking at the number of generated events in Roberto's tcl files). That means if we reweight the SP5 events, we need to apply a weighting factor of 1.128 for nonres and 0.908 for resonant signal MC events. I will include this into wfermi in VirClass. Cheers, Kerstin