Keybed Warping

[Newton Hunt]

Hi Cliff,

A climate control system will help control this situation, but before
installing one I would have a hard look at the back rail or rather the
back edge of the keybed.  There should be some sort of support for this
rail, either a boss, shim and screw from the plate at about the bass
creak or a rod from someplace on the plate to the keybed.  THis is to
hold it in place and prevent what you are describing.

THe likely culprit is that the shim block has fallen out or the screw is
really loose.

Check it out.

                                    Newton