Thank you. And nice job on creating a clean block diagram.
So you want to add another button to the arrays of controls. ?? What I see is that when you run your VI, it reinitializes all controls to default, which will return those 3 button arrays back to a 5 element array.
Get rid of that Reinit to default. Initialize those arrays at the beginning of the code by writing constants to them. Then if you want to add a 6th button, 7th, button, whatever, you can just set another element at the end of that array constant.
I see one other problem. You have arrays of buttons, and a cluster of indicators. You sort of build that cluster into an array by grabbing their control references but then reordering that array. I think that you don't have good correlation between the index of your button arrays with the position of the LED in the cluster. I think you'd be better off if you build your array of control references using the individual control references rather than using the collection of controls from the cluster.
