David, talking about this paradoxial phenomenas like weather helm and tillertug (and push) remains confusing.

The article from Kim Miller ("Kim Tiller") which I'v presented, gives an first insight in the Babylonical confusion of tongues with regard to this subject.
Problem is that in almost every catamaran operation manual is mentioned that weatherhelm can be corrected by raking the rudder.

But we are not the only ones who sail with a hull and a sail.
Looking on internet you will find plenty of articles about "rudder balance" (our tug and push) and helmbehaviour from sailingboats in general.

By the way, Mn's problem with leehelm is indeed more difficult than the most common weatherhelm. That's because leehelm is counterforcing the pressure on the rudder by the hulldrift!!!!???!!

Prosit, have a good sailing