If you glue with Epoxy it will be stronger.
Turn the planks from a board, end for end on every other plank from that board, helps the wood to pull against each other and not all warp the same way!
If you make the blank with all light wood, your need to sheath it with grp matt and epoxy.
I may have some cedar which has been shaped each side with T&G grooves, fits together well and is 19mm thick if you fancy some.
PM me via this site as my email has been hacked and blocked.