Depending on your A-Cat, you could always rig a small spin set up for it, just like those videos of the Marstrom...
Right now I am enjoying not having a spinnaker too much!
My rig time has been reduced to almost instantaneous and the boat still really moves downwind. I know I am not sailing as deep, but I have been surprised by how much the boat feels like my previous spin boat (I-17R) going downwind (heat it up fall off etc.).
