Everett Pianos

[Richard Moody]

To loosen the Hex slot bolts

You can "tap" them loose with a hammer and screw driver.  Its like
knocking a frozen nut loose with a cold chisel.  Put the blade
perpendicular to the edge, tilt it a little and hit it with a
sharp blow from a hammer.
   Or with the edge of a file, file two sides flat enough to grip
with pliers.  If too tight whack this with a screwdriver and
hammer.     ---ric