Now that I have a little understanding of the foam block supports for the seat in the PA, when i unrapped the new hobie the first thing I looked at is the foam block supports for the seat inside the hull. I think because of the slope of the hull and the fact that the inside of the hull is really smooth, both foam blocks had shifted along the hull and had I left them alone, I don't think they would provide the nessesary support. I think tony has a great idea in using Velcro on the blocks to keep them where they belong. Good call tony!