lookng into my next diy board project. got a design ready to go but this time would like to build an eco board

being diy i'm trying to avoid peel ply, vacuums etc.

current plan is,

bio resin
recycled foam core
Sandwich of 4.5 oz double bias basalt / 3mm balsa / 4.5 oz double bias basalt
3oz PET cloth finish (recycled plastic)
0.6mm beech veneer foot strap area (very high density sustainable)
all boxes set in paulownia (sustainable)
basalt/carbon rail tape
double bias basalt patches to nose and tail.
cork foot pads

has anyone been down this road. or have a different take on it?

problem with balsa is water damage. could use 3mm corelite PET which is closed cell and 100% recycled but doesn't have the density of balsa.