A member of our club added a spinnaker to his H17. It seems to be a mixed success in my opinion. Although, he loves it. He initially broke his spin pole (I think the first time he tried it). Since then it's been successful, so much so in fact, that he bought a brand new H17 for racing, in addition to his old one w/ the spinnaker and he didn't sail his brand new boat for what must have been 2 months. It seems to be more of a light air oriented rig due to the comptip, and this particular person's spinnaker looks extremely large for the H17. In very light air, he was able to keep up with a Tiger...

-Justin