Ryan without seeing what you have for an outfeed table that's hard to say. You have to watch that one function doesn't impact other functions so if you do it it is likely something that should attach with pegs or screws so as to be removable when not needed. Sometimes it is better to take something like that and build it so that it clamps to your table instead so that it is easily removable and doesn't require alterations to your outfeed. Also, by mounting it on a scrap of plywood you will not be risking getting a bunch of glue on your table if you also plan on gluing the joints, which I would probably do.
Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.