I was just out at the field where i fly. I tested a smoke system i made, using it on my great planes super skybolt. It is powered by a Saito 100 Fa (nice engine) If you go to this site http://www.rcmodelers.com/INTRODUCT/...ntrosmoke.html[/L] there is a pressure system for smoke. It was easy to install, and it works extremly well. The smoke valve and check valve can be bought from Perry. You can use your flap nob on your transmitter (if you have one) to adjust the amount of smoke going into the engine. I highly recommend this setup!!