"AAvK" wrote in message
news:z6nif.10159$dv.5823@fed1read02...

What about simply wetting the boards, wet towel on top or wrapped and
weighted with
cynder blocks, convex on top? That way, I should think I would not lose
thickness of the
top (as completed) before handplaning to flatness. Would it work?


Nope. Once they dried, they'd return to the relaxed position.