Hi,  Larry Mayo was asking about warped keys.  I use about the same
method he was describing, but if the key has a twist I do this.

I take one or two 3/4" by 1" or so scrap pieces of wood, about a foot
or so long, and bolt or clamp them together just behind the front end
of the key.  Then I clamp the other end in the vise and put a hot plate
with a tea pot underneath the key.

I hang some kind of weight, like a clamp or two on the end of the
pieces I have clamped to the key.  I actually over-twist in the other
direction by just a little, so that when it springs back it will come
back to level.  This really works.

Don't hang too heavy a weight on the key, of course -- you don't want
to crack it.  You also might want to support the key in some way so it
doesn't warp side-to-side, unless you want it to.

I have worked on two Reproducos where one or two white keys (I forget
which ones), about an octave down from the top, were warped away from
each other like there was something wedged between them for years.
This operation twisted them back into level again.

Tony Marsico
tony51@ix.netcom.com