OK - making a panel up 7mm ply, ~900 x 400mm, two strips of 70 x 35mm pine @ 900 long glued to the (almost) edges - along the long sides..

Ummm the pine is the wonderful banana beam from Bunnings.

It's the chassis of a binary cooler, that slots into and out of a window frame - when the seasons require. Hence the need for real flatness of the ply.

For some reason I did not notice the warp in the pine, when I glued and clamped it all together., or it looked flat at the time.

Now it's all dry - if it was laid flat on the cement, one corner would be about 25 - 30mm off the ground.

And I want to pull it straight and hold it like that.

I figure that I can reverse twist it, and glue and clamp some bracing that is going on anyway...

Dunno.... a few weights, a straight edge a long wait, and the glue to spew.

Maybe some over pressing to account for spring back.

I dunno, I can't pose some thoughtful whining as a sniveling question, but perhaps the best way to make use of it, is for people to write up about how they kind of fix blunders or more to the point - how they pull twists and warps out of timber and assemblies - and then lock them.

The floor is now open for sharing.