The danger is that the selection criteria may remove signal if the absolute values of the distributions are incorrectly modeled. To investigate this potential problem, the final values of the cut variables were compared to the predicted distributions. The signal efficiency for most of the parameters is not sensitive to the precise value of the parameter. In the next version of cut optimization, further care will be taken to avoid a sensitive dependence on the precision of MC for signal. In the future, this cut will be applied after all other variables, but only if it improves the signal to noise.
Care is required to insure that acceptance at large zenith angles is retained.