I had smoke in my Cmpro extra with saito 180. I was also using the slimline pitts and showtime pump. I heard that the 4 stroke run hotter than 2 stroke glow (not sure tho). Either way i was using a tank about the same size as the fuel tank. This gave me around 4mins to burn time on the smoke...it chews thru it fast. The smoke produced is nothing like that of a gasser tho. The density isnt that great, even on the ground. the smoke system and oil will add considerable weight. If i had my time over i would stay away from adding smoke to anythin less that a 50cc gasser. Just my 2c/