Body

You have to drill out the rivet in the end fitting and move it in or out a small amount before re-riveting. Also check that the rudder blades are tight in the stocks. Any movement here is another no-no. The last thing to check on the rudders is the profile of the leading edge of the blade. This can be lightly sanded with appropriate wet and dry sandpaper to produce an improved hydrodynamic ... ................
................