Before you disassemble anything, lets review the basic rudder adjust procedure.
1. rudder should be down, locked and centered
2. directional control lines should be taut
3. now, move the rudder control lever full left and full right and look for equal rudder deflection in each direction. Adjust your lines at the rudder accordingly. Don't worry about where the rudder control is pointed at the rudder mid-point -- it can vary slightly. Your objective it to get equal rudder deflection using the rudder control, not the rudder itself.
I think this will do it for you.
Here's a link reviewing the procedure.viewtopic.php?f=11&t=45884&p=196423&hilit=#p196423
If after that you still have a problem and you don't want to have your dealer fix it, you can lift the "H" emblem off with a dental pic or fine instrument to access the handle nut. As I recall though, the handle is not adjustable. If you remove the handle, be sure and use "Loctite Blue" or equivalent when reassembling it so it doesn't start backing out over time.