ASW 24&27 rear fuselarge vents?

Sorry about the previous message.
I became suspicious when I noticed reams of foam
around the canopy as well as the cockpit opening,
to the point that the canopy would not line up along the fuselage line,
The brass bushing that holds the canopy down and locked was worn out, I
assume because of it.
I have a generous exit vent on my other glider and no seal on the canopy.
The fit is no better or worse than any other glider, still the cockpit is
relatively quiet through out the speed range.
Udo