Bill,

I have been super busy but will get crackin on this right after Xmas.

I plan to use 3 layers of 3mm (3 ply) marine okume and bond with west systems epoxy.

Do you think that I should have the two outer layers of plywood run with the grain the long way and the center layer run width wise?

I can always add a layer of cloth on the top or bottom if necessary.

Real Makos have no flex, but still ride really smoothly through the chop, so I don't need flex - but unlike most boards, they do need a lot of rocker or they don't ride correctly.

Thanks,

Ed

should be ok, if you have enough longitudinal stiffness from the top and bottom layers.
middle layer at 90 deg if convenient to bend onto table or helps with amount of waste material.
...otherwise, its a toss up.

merry christmas.
-bill

Bill,

The board is 150cm long, so it sounds like except for material savings perhaps I am better off at maximizing the strength along the length. I plan to go big on this stick and would rather not have it fail on me.

Have a great holiday.

Ed

ps you should come up to the Cape some time.

no worries.
even marine plywood is not the most efficient way to get high strength.
but they do give you good dimensional stability and better lateral properties than simple planks.
after its done, you always have the luxury of easily changing the strength and stiffness with a bit of 4oz glass.