I found this thread and it is exactly what my engines are doing http://www.rcuniverse.com/forum/m_10644054/tm.htm I'm going to install some kind of baffeling and also the air dam. On my stearman I only have the area where I cut out one of the fake cylinders in front of the head and a pits muffler under the carb, pretty much the same set up with the Ryan. I know what you mean about the age thing myself, I was filling up my smoke tank once and kept staring at the gas vent line waiting for it to over flow and wondering what was taking so long to fill the smole tank[X(] Only pumped about a pint of smoke oil all over my garage floor[:@] DOH! I'll keep you posted.