To recover in a dive, use minimal elevator. Too much and you're just going to snap again and repeat the process until your plane attempts subterrainian flight. You shouldn't be using any rudder during the dive recovery; that will put the plane in an uncoordinated condition and induce a snap. Remember it is possible to have too high of an angle of attack even though the nose is pointed straight down; your plane can and will stall at any attitude and/or airspeed.