This may be faulty memory, but I seem to recall that the Open
Cirrus used a pushrod rudder drive with cable drive from pedals
to just behind the seat; early ones suffered from rudder flutter
and a hydraulic damper was fitted to the system. Subsequent
Schemmp-Hirth designs ran the rudder cables all the way to the
rear fuselage, and the guide tubes were slightly waved to
increase friction for rudder damping.

Ah! you have illuminated a point about rudder flutter.
In 1972 the bank bought me a kestrel 19 for an important
comp.
I discovered in the precontest flying that it was prone to rudder
flutte
well below rough air speed, quickly damped by pushing on
both pedals, bu
it gave one pause when aiming for the start line.
3 years later I acquired same kestrel in pieces after a
syndicate had ben
it. On inspecting the fuselage layup, I found that this
was orthogonal to, not 45 deg to the Cl. Hence the rudder
flutter
, fuselage lacked torsional rigidity. The repair was acording to
factor
specs, but I did add mass balance to the rudder at the TOP.
Test flights showed the flutter speed had moved up above the
roughair speed; much better.
Now I understand why cables in PE tubing are much safer.
JM