Allen Dick wrote:

> >These are fine,
> > and they minimize exposed end-grain but require stock
> > that is absolutely planar for the scheme to work
>
> That means pick boards that are flat when buying, and keept hem wrapped in
> plastic until cut and assembled, taking them out only when ready to cut, and
> covering them again unless they are to be assembled immediately.

Sometimes the boards will "cup" anyway. If they do here's how I straighten them.
I spray a little water on the cement floor of my shop. I then lay the cupped
boards on the wet floor, concave side down. Depending how badly they are cupped,
it will take from a couple hours to overnight to straighten. The boards can then
be milled.

                                                                Mike

>