The ASW 20 has instructions to nock the fuselage pins
out and put shims behind them to remove slack, apparently
to prevent the fuselage fishtailing. The Hornet and
Club Libelle i fly both have external shims on the
fuselage pins, they would have a lot of slack otherwise.
manufacturer maintenace manual should advise

Pete

At 16:54 02 July 2007, Jack wrote:
I have noticed several older sailplanes with some play
in the wings.
They don't seem to pull into the fuselage and have
a few thousandths
play so that the wings move fore and aft, slightly.
Can this be
shimmed? I know from working on L-33's that they come
from the factory
with shims. Is this an acceptable fix for older glass
ships?

Jack