I have one of those router tables that is built into the wing of my cabinet saw top. I want to improve my dust collection and I am considerring building a plywood box with a vacuum outlet around the router. I am struggling with ideas for attaching it to the cast iron. Ideally, I'd like it to be relatively easy to remove. Tapping holes into the cast iron is not my idea of a fun afternoon. I am considering attaching it with some very powerful neodymium magnets. Thoughts?