I have been working on my first board. It's 160 x 48, 3 layers of 1/8 inch Okoume marine plywood, and I don't have a precise scale to weight it on but feels like it weighs as much if not more than my Spleene rip 134 already. I was originally planning on doing 3 layers of 3.6 oz e glass top and bottom. I am wondering if I might be able to do 2 layers instead to save some weight. I tried to put about 3 cm of rocker in it when I glued the layers together but i clamped the middle down to hard so all the rocker is in the tips. The top piece is off center towards the heel side a bit and to pads, I got a sert of liquid force comps for a decent price, are slightly offset as well.
really happy to see u making your own creation : the size should work great for lite wind it looks like a large session board that is a great choice i hope u epoxyed it together and did not use glue glue does not hold as well but if u did it still will work fine if u epoxy the final coat as for the fins put them 2 inches inward and 5 inches from the tip and tail of the board and that is from the end of board to the center of the fin a slight problem i see is making the center flat and rocking the ends up that will cause it to push a lot of water when u are going forward most boards like that have concave in the bottom a better idea is to clamp only 2 inches of the center and allow the rest to assume the flow of the rise also when using wood less fiberglass is needed if u want to cut back dont put any on thr bottom good luck hope it rips
I don't even use glass. Just 4 layers of 1/8 wood For tweaking the flex the 2 layers in between are narrower and shorter The bigger one just longer than then foot strap screws and about 10 inch wide The smaller on on top: aboutb7 inch shorter and 3.5 inch wide The deck covers up the internal layers