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            Angier,
        I spent many hours fighting this issue.  I have the dual system     installed.  The forces required to move the rudder were so great that     you lost all feel for the rudder.  After touch done it was nearly     impossible to avoid engaging the brakes while trying to move the     rudder.
    I'll skip all the intermediate steps and describe the final     configuration.  I have completely removed the return springs on the     pilot side adjustable rudder pedals.  I did add two long, very week     tension springs between the pedals and the firewall just to keep them     from falling backwards with your feet removed.  I took the return     springs on the passenger side and ground out the ID to reduce the     material cross section from about .110 to .080.  I also lubed the     nylon guide tubing with LPS2.  With these changes the dual system     feels like the single set up with standard parts.  As I was working     through this(9 months ago), Lancair was working on getting lighter     return springs for the adjustable rudder pedal assemblies.  I am now     happy with the rudder force and feel.
        Chris Zavatson
    N91CZ