Convert your conventional Apache vertical stabilizer and rudder to the squared-off look of the Geronimo and Aztec. For sale are fiberglass caps for the tops and a sheet metal addition for the top rear of the rudder to add back some rudder area and complete the squared-off look. Removed from a Geronimo tail.Fiberglass should be sanded and repainted, sheet metal may be used as-is or as a pattern to cut new pieces.