re: Oval cut

+1 what Bondo said. Also because you will be hitting all grain orientations, this would be a good place to use a climb cut …….. only if you’re confident with it. It’s not hard if you secure the piece well and understand that the router will try to “run” and grip it correspondingly. It will prevent any tearout as the blades aren’t digging into the end grain that you will encounter twice on your way around.