I was able to get an SVG out of the process, but it leaves a little bit to be desired. The corner kerfs aren’t properly attached to the other paths, so they show up in the UI as separate parts and have to be kept together when moved. It’s not ideal. Plus, the dimensions change almost randomly when going through editing programs. The plugin is indeed much easier.
One note: on Proofgrade materials, don’t perform kerf adjustment(?) I just cut a piece and the dimensions come out almost exactly as the designed dimensions.