|The Ovi carbon boat is carbon on the inside and iI dont think it is vacuumed on. The problem has been the hulls have come out only 9kg underweight. Therefore to wet the carbon out they had put 11kg more resin in the inside laminate. The new boats may be better.
As a comparison the boat Gavin built for me was 20.9kg under weight – it has carbon both sides of the hull and the underside of the deck. He charged me £500 for all three layers of carbon pre-preg.
The carbon layer inside will make the boat retain its stiffness a lot longer, so it is a good investment.
Carbon cloth is fiddle to fit and a lot more difficult to wet out, that is why it is easier to use pre-preg, which fits dry into the mould than manually do a manual wet out – that it why Ovi has to charge more.