Hey there people-
If you have a badly cupped board (across the width) don't despair,
there's potential for a whole bunch of butt-comfy stools there.
Just saw it into short lengths, a foot or so, add legs at each corner
and ails to hold it all together and you've got a collection of comfy
places to sit.
You need a bandsaw to cut the curves of the cupped board, that you've
traced on the rail material, but that's it.
Good summer arts and crafts show sale material :-)