It sounds like you are confusing components and groups. I'm guessing you are selecting some of the geometry in your model to make a component but the selection isn't being replaced by the component. This normally happens if you aren't selecting all of the connected geometry and you haven't ticked the box for Replace selection with component. Make sure that box at the bottom of the window is ticked before creating the component. [image: chkr_Screenshot-6_7_202011_25_49AM.png] Generally it is a good idea to create a component before you continue modeling to create additional geometry that doesn't belong in the component.