Bit, thanks for the link.
I actually already own this ski. If you look close, it's doesn't have the standard JS hood on it. It has a smaller wedge shaped hood on it with the air intake on the back side. It's completely open on the inside... almost as if somebody cut everything off from the back of where the hood would go to the front of the ski and then put a new top on it and glassed it all in. It was done really nice and doesn't look like some backyard job.
I was hoping someone who has been around for a while might be able to shed some light on what this thing is? Was it a kit one of the aftermarket companies sold for the JS 550? What were the benefits of it? Etc., etc.
I've only been able to find one other picture of a hull like this but no other info. Here's the other pic.