Nope your looking at standard carbon strips under glass done very straight on the deck and the “grooves” are scraped in with a comb or other tool on the bottom of the board to help add a very small amount of adhesion surface for where the fins will go , thats why you see the fin marks on the first two images. Do not try to lay carbon into grooves singularly unless you have very much patience!!:)The grooves look quite cool but not sure if the add very much strength at all…someone may be able to correct me.
Glassed the wax comb groove things years ago. another gimmick for the glasser to fart around with and get no extra money for{ but it only takes 5 minutes extra to glass} yes multiplyed by 5 boards= 25 minutes gone!!!..all my sticker cutting time gone…peace
want to make the top side of carbon tape flatter cut the hem off pull one strand out…{ good basting with laminating resin after glassing so you do not bring weave up when sanding}