In addition to isolating components for various analyses in OpenVSP, Sets are a great way to quickly switch between configurations or assembly groups. For example, you can have multiple different versions of a vehicle in the same model and only include particular configurations in a Set. One configuration may have a highly swept wing and V-tail while another may have a low aspect ratio wing with no sweep and a cruciform tail. This is different than leveraging Variable Presets to alter the overall parametric shape of a component for a design change and intended more for significant configurations changes. Similarly, Sets may be used to show only specific groups or assemblies so the user can focus on a particular element or region of the model. Hiding everything in a model except for the engines or propellers is one such use case. Your modeling efficiency and speed are greatly improved by leveraging Sets for group isolation in these ways.