Thanks Ken and Minn. That definately helps me understand how it works and that I do not need to buy a $100 "smoke" muffler. What do you think of this?
http://www2.towerhobbies.com/cgi-bin...?&I=LXTU96&P=7
What I don't see here is a way to plum this into the exhaust system. I was thinking of drilling and tapping another "nipple" in the exhaust pipe header similar to the one that is used to pressurize the fuel tank.