Those damn self tackers!!!! It has always been my humble opinion that if a cat uses a self tacker then it shouldn't really have a jib!! The entire concept of a self tacker on a cat is to try to make the jib more "automated" and as such tends instead to make it almost superfulous to needs, and more of a liability than an advantage. I have always felt that on a cat that carries a spinnaker the jib gets in the way more often than it helps anyway.
I am sure that there are many sailors with quite contrary views though.