Done Wood/form composite, works, not worth the effort, they break more easy, but lighter. I like straight wood/fiberglass composite. Rocker, camber, different flex are possible. I use shaping/rocker/camber, and fiberglass stingers to change how a board rides. I place the stringers in the middle, saves wieght, but not as effective as on the outside.
I've thought of doing the same thing, but I agree with "bay surfer". If you're going to spend the time to shape and laminate a foam layer onto wood, might as well shape the entire board from foam. Maybe add 1 veneer of wood on the top if you want to use both.
I wouldn't even bother with glass on a wood board. 2 layers of quality plywood (baltic birch) makes a strong board. Feel free to glass if you don't care about the extra weight.
The Jamestown video is right-on for doing inserts. If you can, add glass bubbles to the epoxy mix, reduces weight and it's easier to sand.
OK, 1/2 in/12mm Shaped ( rocker+concave ) wood composite boards made out of (AC or Baltic Birch) are almost unbrakable. A unshaped 1/2 piece of ply (AC or Baltic birch) is also pretty hardy in a normal size, just make sure the largest amount of wood laminations run the length.
Door size straight ply boards do tend to brake if you jump alot, but they take 10mins to make!!!! and I always make 2 out of a sheet of ply.
Straight skinned foam boards will brake easy, so most plastic board makers will lay up multiple layers of whatever is thier pleasure, for a stonger board.
Foam/wood composite boards can be very stong/unbrakable, But you just dont slap some foam on a peice of ply for a strong board you dont use ply.. in this typeof construction the wood veneers act like glass and absorbs the epoxy stiffining the veneer and those veneers are married to thin foam pieces, for multiple laminations.
So when you make a Wood Composite, you make a stiffer stronger board by soaking the two inner ply veneer laminations with Epoxy stiffing and strenthing those laminations, and if you use glass that also makes a additional lamination
I usually also Glass (in between) the plys, under the pads and cross directional stringers, glass around all the edges. I use Glass drywall Tape for my glass it sticks to the board, comes in 2 in wide rolls is very cheap and easy to use. 7 to 8 oz of epoxy/flour (yes flour) ... mix is used in my layup. I finish the board in 7 coats of fast dry poly, which is a hell of alot (cheaper/durable/faster/LIGHTER) than Epoxy. Plus you can color poly for some bright colors, Just have your local hardware store add the color just like they do for paint, but AT ONLY 30% of the amount they normally use.
Laminating skills some use tables, floors, wieghts, bag pumps, clamps, My personall preference is a table and the use of drywall screw for clamping the board for layup, You just fill the screw holes with epoxy/floor, you dont even see them.
Heres a pixof my latest board with colored poly finish.