My first boat was a Spectra it had a Glenwood(huge) brass rudder on it. I noticed my Brass prop had a big crack in it 1 week before a trip. I took it into a shop to get the prop replaced and was talking to the owner telling him how the boat pulled to the right. He grabbed a grinder and beveled the left hand trailing edge of the rudder about 4 inches from the top down.
This seem to ease the pulling, but never completely got rid of it.
I'm currently running the same rudder on my RaysonCraft just because I got low on funds during the build. I really need to retire that rudder
I've heard the Schiada Rudders help with the pulling, also.
Jerry