I would have posted this sooner, but the previous rudder was a failure. I used 4mm okume wrapped in 6 oz glass for the rudder but did not reinforce the weakest point with glass.
Result:
I looked around for another material to use for the rudder. I thought about using black rubber trim that is used to trim the lower part of walls. then I came across a sprayable rubber coating used for tool handles. I decided to use sheet metal coated with this stuff.

Rubber coating
I had priced commercially available rudders and footpegs and decided I was too cheap to shell out $300 - $500 necessary to obtain them. My rudder assembly (except for the Metal and Coating), and steering system are made almost entirely of scraps.
I used leftover glass tubing from my scuppers for foot pegs. The pedals are clutch pedal covers.
I used your (DM) suggestion for running the cables under the cockpit.
Here are some pics of the finished rudder system:
The Rudder carriage (I gues that's what you'd call it) came from a link that was posted by hoz when I asked about a kayak sail here
viewtopic.php?t=2145
this link was posted
http://www.laurieford.net/rudders.htm
Here's My version:

I'll let you know how it works after I test it on Monday.