While routing (using the 1/2″ x 1″ template bit), I had the a very nasty tear out. I never climb cut and probably never will with a hand held router. I don’t feel I was trying to take too much material in one pass, but maybe a shorter bit is required. I’ll invest in a new template bit for the next build.The end result isn’t pretty. I put some glue in it to stabilize it so I can sand it and see how it turns out. I don’t think trying to back fill it will work well.