For the chute I glued together two rectangles approx 20cm wide of 8mm foam into a slightly flattened arc that stretched across the boat. Loads of clamps were used as normal. Once it was set I cut the fwd section into a curve. The pic below shows some of the foam that I cut out.
After that I bonded it to the hull, added some bits of filler to help round out some areas sanded it into a smooth shape before covering with Carbon. I tried to keep all the corners with wide radius where the kite is likely to contact on drops.
The hull is about 30cm wide where the hoop is, and the hoop is about 20cm above the deck.
I also bonded some tube to the gunwale to increase the radius to make it eisier to get back in after a trawl.