I am gluing together a four piece runner and rail for a cabinet I am making. I have a 1/2 inch dado cut in the front and rear and a 1/2 inch tongue to go into the dado. I have made a jig with four wooden courners for the frame to fit snuggly into while the glue dries. Because the wood I am using is walnut I have concerns about nails or brads. If the brads are only to hold it together until the glue cures then is it necessary to use the brads.