I remeber reading an artical on CLC's site about a retractabel skeg. You migt want to take a look.

: I uses Prijons pedals and they works great. It ís smart to buy the pedals.
: The rudder mechanism is rather easy to make yourself special the blade. I
: used 6mm industrial pneumatic plastic pipes to run the rudder line (3mm)
: thru. The line must be very stiff. lines that you hoist sails with works
: nice. If the kayak is hard to turn or turns from the wind you can remove
: the skeg.