So I implemented this one while I was working on things this weekend. Eventually, (I think) we want to use all the simulated data over all coszen-not just the simulated upgoing events-and when we do this, we will need a function that takes the current bins (in true cz) and converts them to the same binning (for reco cz) upgoing only.

I do not have this in the current version-i.e. I am only using simulated upgoing events. Does that make sense?