Oj, been working ower the holidays on similar thing (finaly some time), I usualy try to make boards out of the comman stuff. 2 different types of wood here -soft edges (25% of length which is actually over sized skim 130x54 cm, mirror TT)
you can still se on picture the stuff that was soft brushed off, hands last
board ready now for vacum ...
I decidet not to put anything on top, 2 layers of carbon under and thats it, soak top with epoxy and than see depanding on weight and flex. Wood is actualy a spruce tree, slovenian and african (called Marupa..basicly same thing to ours just lighter.maybe more flex) so just hoping to stay under 4kg.
has a 3 cm concave so i want to keep the flex in all directions. + additional rocker (no cheating)
I say just go for it, but apply in 2 stages the glass, to see after some days what flex vs stiffness
u forgot to tell: startded with max 1cm before even tuching it with el. grinder.