Trax540,

I would keep it as simple as possible.

Pulleys will not create a lot of stress; we are talking about just the force created by a control surface deflecting in the air.
Just be aware to reinforce the point of installation accordingly.
The good thing is that the whole system can be tested for flaws before any flight.

I like the idea of the nylon tubes, but I couldn't find pictures of such a system, nor the magazine of reference.

Here you have some more info of what can be done:

http://web.archive.org/web/200702050...d/pullpull.htm

http://web.archive.org/web/200702052.../pullpull1.htm

http://www.mindspring.com/~rellis2/rcpattrn/ppull.htm

http://www.swbmfg.com/

http://www.swbmfg.com/rudex.html

http://www.hpcgears.com/calc.htm