Hi Chukwudi, could you please post the following numbers: The errors for PBRBR in 1D and 2D-unfolding as a function of mm2 such that we can directly compare the 4 different selections in numerical terms. It's hard to read the errors off from the plots in a sufficiently precise way. I would like to check how large the difference in the statistcal error is in order to understand if the difference we see for the different selections is statistical significant or not. Thanks! Cheers, Heiko