or if you wantto get real expensive, you can hook both the heating element wire and the smoke pump to a reversable ESC and couple it off the throttle input via a Y-cable. this will allow you to generate poportational smoke when you rev the throttle. to get the smoke to pump out on both forward and reverse. you will need to wire it with 2 diodes so that when you go either way, the smoke pump and heating element will see the same polarity either way.