CJ2478 said..Plummet said..2x 3mm sheets. So 6mm core.
Yep bamboo is heavy. But its strong as fark and has similar flex properties to carbon. Makes for s strong board with good flex properties.

is this bamboo flooring stuff?
Does it bother you that the fillers and binders in there optimised for flooring? I guess its just acting as a 'core', but in this case why not go for something lighter?
If you got the gear (vacuum bagging equipment) and going to spend on carbon why not go for PVC foam?
Cool design, love those inserts
Yes, it is bamboo flooring. At first, I worried about delaminating ply. But after 3 x kiteboards, 1 x landboard and 4 x longboard skateboards all made with the same bamboo ply and no delaminating I'm no longer worried.
Why not go for lighter? for the reasons listed above.
PVC foam doesn't have the impact resistance and the shear properties are worse. Yes, it would be lighter, but it wouldn't withstand a direct hit from a boulder without damage. Bamboo/carbon combo bounces off the boulder and keeps on rocking