I am making an electrical panel that has a multitude of knockouts for conduit connections. Each knockout needs to have the ability to have different sized conduit attach to the panel. Is this possible? If so, is there a somewhat easy way to accomplish it. I know when I put a connector on something like a junction box. I can pick the size of the conduit when working with it in a model. Doesn't seem to work the same way with a panel.

Thanks.