If you guys are looking for a cheap n cheerful smoke unit, have a look at the 1/16th scale "hen long" tanks, you can get a smoke generator for the exhaust on these tanks. the actual generator is about 40mm square. takes ordinary smoke fluid, has a sealed box lid, held on by 4 phillips screws, and tank lasts about 15mins bnefore needing a refill.
Price of smoke unit, I bought mine off "flea bay" for £15 inc postage from hongy kongy, arrive din just on 10 days. Fitted in my Sun Tug a treat.
Wiring? simply cut off the factory fitted connector and connect to a switched power supply, it runs happily off 7.2 volt, ok on 9.6 [so would accept a transmitter batt pack] but its a bit heavy on fuel when powered off 12v direct, not unless you step it down with a resistor.

