grand hinge to rim screws stripped

[Jon Page]

The bass string is a nifty field repair but chances are the case
is also split. Remove the hinges and inspect the damage.

Glue and clamp, don't plug with dowels (end grain). If you don't
have a long plug cutter, the case can be glued and the holes filled
simultaneously with epoxy.
-- 

Regards,

Jon Page