I have come across what I think is a rather interesting issue. When using ITemplate to create a NestedViewTemplate the InstantiateIn method gets called on the initial page load before anything has been expanded. Is this normal behavior? Also, when trying to view RadGrids inside that template the NeedDataSource method is not call until after the main GridDataItem has been expanded and then collapsed. Is there any way to have NeedDataSource for the grids inside the template fire when the main GridDataItem is expanded as opposed to collapsed?