I am familiar with weather helm though on the smaller raqcing cats you have to guide them to weather to ease them off, they usually dont "head up" on their own, and can flip or pitchpole if overpowered, or sheeted in when a gust hits. I probably should have asked The question differently but I understand now.
I will definitely get the book you reccomended.
Cats are very different from a monohull (and I don't simply mean faster!). Read the book, you will see why.