Thanks for the help. Two of you have suggested that your sterns are not modified. What modifications are you referring to? How would I be able to tell?

What has caused me to ask this question is that I have one rudder that is in the plane of the hull and one that is plumb. The NACRA owner mannual does not indicate. The boat is relatively fast, so I am being careful about changing anything.

There is a good bit of hum coming from the leeward rudders at certain speeds, which I believe is because the trailing edge was filled to knife like edge instead of the flat. Does plumb-ness or toe-in induce any hum?

Jake, By “rubber snubbers” so I sure of what you mean, you mean the part that connects the tiller cross bar to the tiller arms and provides the flex to allow the system to be steered? Can those rubber snubbers be turned a quarter turn and be redrilled and reused if the current alignment is off? Does an adjustable system like the 6.0 exist? Did you check the alignment with the boat rigged and tensioned? Is this necessary?

Thanks again,