I have an editable grid where two of the columns are "Data Type" and "Data Format". Both are to contain comboboxes. The first box will have selectable values such as "DATE", "TIME", "NUMBER", etc. The second box should dynamically attach to either a "DATEFormatStore" or "TIMEFormatStore" - each having a list of valid format values for the selected data type. Ideally, I would like to be able to dynamically bind via something like '{record.dataType}FormatStore', which doesn't work. So, I would love to know a way to accomplish this. I'm open to having also a single formatStore to which a dataType filter can be dynamically applied. Not sure how to get any method to work after having tried several techniques.