Some SZD-55-1 Questions

I have some SZD-55 questions for folks familiar with the 55.

1) How to stop the honking sound when applying rudder in cold weather. The
noise appears to come from the mylar on the vertical and is less prevailent
in warmer weather. Though mylar appears to be in good shape and tight. This
occurs on another 55 that I am familiar with.

2) Anyone have the problem of heavy airlerons? Oringinally I thought the
problem was with the sliders in the wings. I have recently discovered
interference bewteen the fuselage and the airleron torque tube where it
exits the fuselage when the wing is mated. The torque tube is rubbing at the
lower half of the exit hole of the fuselage of the right side. Another 55 at
our field believe they have the same problem on the same side as well. The
ailerons become heavier at higher speed and greater wing loading. The
gelcoat is worn at lower radius of hole and torque tube show discoloration
from rubbing in the 7 to 4 o'clock position when viewed from side.

3) Has anyone found a place to improve fuselage venting on the 55?

Thanks in advance, WDM