here is mine. thats without resin coating.
the timber is just a plain peice of laminated pine board. made up of small pieces of pine glued together. i bought the timber from bunnings for $25 i think its made for cupboard doors.
the dimmensions are the same as the naish version. im pretty sure the timber i bought was almost exact length and width.
i copied the shape of the naish aswell. you can see in the photo the large concave i used, it fades out to nothing at the front.
i used it today but the wind struggled to reach 10knots so i got a couple runs along the beach on my 16.
and then this happened.