Yeah I mistyped - I meant different number of columns by cutup. So when a cutup is selected, we make this template so that we can add all of the clips as we get them to the table with the correct number of columns. We've looked at binding a list of lists, but aside from code clarity, I'm not convinced it will be better (and in fact, I'm a little worried it might have some bad implications on scrolling), but it is on our radar. In the meantime we can look at making this its own function.