When you drill a hole on the other side of the rudder, you must make sure NOT to drill it even with the one on the other side...drill it about 1/4 inch higher. Also make sure the vertical passage is opened up to 1/8 inch diameter...the fitting at the top also. Be careful if you drill the fitting...the ones on my Seaducers where plastic.

Hy Marc.
Ok, Thanks for you interest

Scott

I finally found some one who understands the dynamics of rudder blades and there dynamics under stress (hydro(aqua)dynamics. the inside of the rudder produces a vacuum
(void) of water you can prove this while stirring your coffe and mike mix

Dave