I read on the CCV website that 100 lbs is the limit for lifting the top. But looking at all these pics of racks for CCV tops made me think that people are lifting lots more than 100 lbs. Unless they are carrying styrofoam on them.
So I installed the Hullivator and instead of the big tandem kayak I started with a similar, but smaller, single kayak. The top went up like a champ, with me helping with a push on the ceiling for the first 12 inches. Pics attached.
So it seems to work, but managing the Hullivator at the 8+ foot height of the roof is challenging. I'm going to try rollers mounted on a Yakima bar at the rear of the roof and try to load it from the back. Without the Hullivator we will save 39 lbs. Tomorrow's project.